problem with html2pdf pdf in php pdf detects viruses and consumes a lot of resources in generating pdf

I am generating a pdf with the html2pdf library in php, however, I am experiencing two problems.

1.- The file can not be downloaded because it indicates that it has a virus. I do not have the slightest idea why this happens. I'm working on a totally new instance in a development environment I do not think the server really has any viruses. 2.- When starting the process, it consumes many resources. The system has queries to stored procedures and views and in use 10 users do not consume more than 4% of the processing. However, when generating a pdf it goes up to 40% or 50% or for example in my capture it went up to 70% of the processing CPU.

Can you give me some clues of what I'm doing wrong please? : (

First, screenshots of the problems.

My code

This file (My controller), is receiving a GET parameter, this parameter is the encrypted ID of the file that it has to build. So what I do is,

Driver

<?php 
    define('__h__', dirname(dirname(__FILE__))); 
    require_once(__h__.'../../../libs/html2pdf/vendor/autoload.php');

    use Spipu\Html2Pdf\Html2Pdf;
    use Spipu\Html2Pdf\Exception\Html2PdfException;
    use Spipu\Html2Pdf\Exception\ExceptionFormatter;
    $path=__h__.'../../../host/';

    if(isset($_GET['id'])){
        $candidato = new candidatoController($_GET['id']);
        $archivo = 'CV_'.$candidato->getNombreCompleto().'.pdf';
        $validar = $candidato->getId();
        if($validar!=NULL){
            ob_start(); 
            require_once 'views/pdftemplates/cv.php';
            $html=ob_get_clean(); 
            $html2pdf = new HTML2PDF('P','A4','es','true','UTF-8', array(15, 10, 15, 10));
            $html2pdf->setDefaultFont('Arial');
            $html2pdf->writeHTML($html);

            ob_end_clean();

            //$html2pdf->Output($archivo);
            $html2pdf->Output($path.$archivo, 'F');
            $salida =$path.$archivo;
            header('Content-type: application/pdf');
            header('Content-Disposition: attachment; filename="'.$archivo.'"');
            readfile($salida);

        }else{
            tools::alerta(2, "Ocurrió un problema al descargar el archivo.");
        }
    }else{
        header('Location:  '.__PATH__.'panel');
    }


?>

Vista cv.php

<?php 
    $candidato = new candidatoController($_GET['id']);
    $validar = $candidato->getId();
    $imagen = $candidato->getImagen();
 ?>

<style type="text/css">
<!--
    body {
        font-family: Arial, Helvetica, sans-serif;
    }
    table.page_header img{max-width: 30%; }
    table.page_footer {width: 100%; border: none; background-color: #00a651; border-top: solid 1mm #00a651; padding: 2mm}
    h1 {color: #2a2a2a}
    h2 {color: #2a2a2a}
    h3 {color: ##2a2a2a}

    div.standard
    {
        padding-left: 5mm;
    }
    #imgperfil{
        width: 100%;
    }
    hr{ 
        margin-top: 15px;
        border: 0;
        height: 1px;
        background: #333;
        background-image: linear-gradient(to right, #ccc, #333, #ccc);
    }
    p{
        margin-top:2px; margin-bottom:2px;
    }
-->
</style>

<page backtop="14mm" backbottom="14mm" style="font-size: 12pt">
    <page_header>
        <table class="page_header">
            <tr>
                <td style="width: 100%; text-align: left">
                   <a href="https://misitio.com.mx"><img src="https://misitio.com.mx/images/milogo.png"></a> <br>
                   Conectando excelentes profesionales con las mejores empresas.
                </td>
            </tr>

        </table>
        <hr>
    </page_header>


    <h4>Datos del candidato:</h4>
     <table style="width: 100%;" align="left">
        <tr>
            <td style="width: 25%; text-align: left; ">
                <img id="imgperfil" src="https://misitoi.com.mx/images/usuarios/<?php echo $imagen; ?>">
            </td>
            <td style="width: 75%; text-align: left; padding-left: 20px">
                <h3 style="margin-top:0px; margin-bottom:0px;">
                    <?php echo $candidato->getNombreCompleto() ?>
                </h3>
                <h5 style="margin-top:0px; margin-bottom:0px;">
                    <?php echo $candidato->getProfesion() ?>
                </h5>
                <p style="margin-top:0px; margin-bottom:0px;"><b>Nacimiento</b>:
                    <?php echo $candidato->getFnacimiento() ?> <b>Sexo</b>: <?php echo $candidato->getSexo2() ?> 
                </p>
                <p style="margin-top:0px; margin-bottom:0px;"><b>Dirección</b>: 
                    <?php echo $candidato->getDireccion().', loc.'.$candidato->getNLocalidad().', Mpio. '.$candidato->getNMunicipio().', '.$candidato->getEstadoAbrev().' C.P. '. $candidato->getCP(); ?>
                </p>
                <p style="margin-top:0px; margin-bottom:0px;"><b>Teléfono</b>:
                    <?php echo $candidato->getTelefono() ?>
                </p>
                <p style="margin-top:0px; margin-bottom:0px;"><b>Email</b>:
                    <?php echo $candidato->getEmail() ?>
                </p>
                <p style="margin-top:0px; padding-bottom:40px;"><b>Clave única</b>: 
                    <?php echo $candidato->getCurp() ?>
                </p>
                <br>
            </td>
        </tr>
    </table>

    <h3>Sobre mi:</h3>
    <p style="text-align:justify">
        <?php echo $candidato->getSobremi() ?>
    </p>

    <h3>Historia laboral:</h3>

    <?php 
        $historia = $candidato->getHistoriaLaboral();
        foreach ($historia as $key => $value) {
            echo '<p><b>'.$value['titulo'].'</b> en '.$value['empresa'].'</p>';
            echo '<p>'.$value['inicio'].' - '. $value['fin'].'</p>';
            echo '<p>'.$value['descripcion'].'</p>';
            echo '<br>';
        }
    ?>





    <page_footer>
        <table class="page_footer">
            <tr>
                <td style="width: 50%; text-align: left">
                   <?php echo  'Curriculum vitae de '.$candidato->getNombreCompleto() ?>
                </td>
                <td style="width: 50%; text-align: right">
                    Página [[page_cu]]/[[page_nb]]
                </td>
            </tr>
        </table>
    </page_footer>

</page>


<page pageset="old">
    <h3>Historial académico:</h3>
    <?php 
        $historialaca = $candidato->getHistorialAcademico();
        foreach ($historialaca as $key => $value) {
            echo '<p><b>'.$value['curso'].'</b> en '.$value['institucion'].'</p>';
            echo '<p><b>Periodo:</b> Del '.$value['inicio'].' al  '.$value['fin'].'</p>';
            echo '<p>'.$value['descripcion'].'</p>';
            echo '<br>';
        }
    ?>

    <h3>Dominio del idioma:</h3>
    <table style="width: 100%;" align="left">
        <tr>
        <?php 
            $idiomas = $candidato->getIdiomas();
            //var_dump($idiomas);
            foreach ($idiomas as $key => $value) {
                echo '<td style="width: 25%; text-align: left; ">';
                echo $value['idioma'];
                $candidato->estrellaspdf($value['puntuacion']);
                echo '</td>';
            }
        ?>
        </tr>
    </table>

     <h3>Información adicional:</h3>
     <p><?php echo $candidato->getInfoAdicional() ?></p>
</page>

Thanks for your feedback.