#!/usr/bin/perl
use warnings; use strict;

use PDF::API2;

my $pdf = PDF::API2->open('/tmp/test.pdf');

foreach my $pagenum (1 .. $pdf->pages) {

  my $page = $pdf->openpage($pagenum);
  #
  # Get the page size
  #
  my @mbox = $page->get_mediabox;

  my $gfx = $page->gfx;
  #
  # Draw a box 10pt in from the edges of the page
  #
  $gfx->linewidth(1);
  $gfx->strokecolor('#000000');
  $gfx->rect($mbox[0]+10, $mbox[1]+10, $mbox[2]-20, $mbox[3]-20);
  $gfx->stroke;
}

$pdf->savas('/tmp/test1.pdf');