In order to import a specific page of a PDF file into a Picture Box in a QuarkXPress layout, add the string 'pdfpage=n', where n is the page number. Following is an example of the syntax:

http://localhost:8080/pdf/document.qxp?pictureboxid=file:abc.pdf&pdfpage=3

Note: This feature is only available when requesting it through the URL (file:abc.pdf&pdfpage=3). You cannot import a specific page of a PDF file through the /Modifier functionality