ordinary "Compress::Zlib" will do. Below is one of my scripts, also I have a script that reorganizes PDF to become in all uncompressed objects.

use strict;
use Compress::Zlib;

open my $fh, '<d:\WORK\Documentation\protect\PSAX1250_IG.pdf';
binmode $fh;
binmode STDOUT;
undef $/;
my @r = <$fh>=~/\/FlateDecode\s+\/Length\s+(\d+).*?stream\r\n(.*?)ends
+tream/sg;

my $i;

for ($i=0;$i<$#r;$i+=2) {
  my ($l,$s) = ($r[$i],$r[$i+1]);
  print STDERR "l=$l,".length($s),"\n";
  $s = substr($s,0,$l);
  my ($d,$stat) = inflateInit();
  print STDERR "stat=$stat\n";
  my ($out);
  ($out,$stat) = $d->inflate($s);
  print STDERR "stat=$stat\n";
  print STDERR "length(\$out)=",length($out),"\n";
  print "$out\n\n\n-------------------\n";
}
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