how to prevent files from drying up when uploading a pdf with fileUpload in primefaces?

The problem that occurs to me happens when selecting a pdf of 4 pages the fileUpload shows a window in which it loads 260 parts, what happens in this case is that it cuts the pages into 65 parts, if you upload 1 pdf with 1 single page, it cuts it into 10 parts, because of this I think there is a configuration that generates this behavior.

What I want is for the document to go up as is the original in the number of pages and not to be cut.

xhtml

  <p:fileUpload
	disabled="#{allowUploadDocument}"
	fileUploadListener="#{handleFileUpload}"
	label="#{msg['label.document.choose']}"
	cancelLabel="#{msg['label.document.cancel']}"
	uploadLabel="#{msg['label.document.update']}"
	invalidFileMessage="#{msg['label.document.invalid_format']}"
	invalidSizeMessage="#{msg['label.document.invalid_size']}"
	fileLimitMessage="#{msg['label.document.filelimitmessage']}"
	mode="advanced" dragDropSupport="false" multiple="true"
	update="uploadGrid :message" sizeLimit="100000000"
	fileLimit="3"
	allowTypes="/(\.|\/)(txt|doc?x|gif|jpe?g|png|pdf|exe|xls|xlsx|doc)$/"
	id="documentAttached" skinSimple="true" />

public void handleFileUpload(FileUploadEvent event) {
    logger.debug("handleFileUpload ");
    UploadedFile file = event.getFile();
    String fileName = file.getFileName();
    String path = new String();
    if (document.getSeries().getHasSubseries()) {
        path = document.getSeries().getName() + "/" + document.getSubseries().getName() + "/"
                + document.getDocumentalType().getName() + "/" + document.getRadicatedNumber();
    } else {
        path = document.getSeries().getName() + "/" + document.getDocumentalType().getName() + "/"
                + document.getRadicatedNumber();
    }
    logger.debug("ruta para subir archivo:" + path);
    DocumentAttachedData attachedFileData = new DocumentAttachedData(fileName, path + "/" + fileName);
    attachedFileData.setContent(file.getContents());

    attachedFileData.setDocumentPath(path);
    attachedFileData.setType(getMimeType(file.getContentType()).name());
    List<DocumentAttachedData> fileList = document.getAttachedFiles();
    fileList.add(attachedFileData);
    document.setAttachedFiles(fileList);
}