 <p>I do not know much about <a href="http://metacpan.org/module/CAM%3a%3aPDF">CAM::PDF</a>. However, if you are willing to install <a href="http://metacpan.org/module/PDF%3a%3aAPI2">PDF::API2</a>, you can do:</p> <pre><code>#!/usr/bin/env perl use strict; use warnings; use Data::Dumper; use PDF::API2; my $pdf = PDF::API2-&gt;open('U3DElements.pdf'); print Dumper { $pdf-&gt;info }; </code></pre> <p>Output:</p> <pre>$VAR1 = { 'ModDate' => 'D:20090427131238-07\'00\'', 'Subject' => 'Adobe Acrobat 9.0 SDK', 'CreationDate' => 'D:20090427125930Z', 'Producer' => 'Acrobat Distiller 9.0.0 (Windows)', 'Creator' => 'FrameMaker 7.2', 'Author' => 'Adobe Developer Support', 'Title' => 'U3D Supported Elements' };</pre>