use strict;
use warnings;
use CAM::PDF;
use CAM::PDF::PageText;

my $file = $ARGV[0];
my $search = $ARGV[1];

my $doc = CAM::PDF->new($file) || die "$CAM::PDF::errstr\n";
my $pages = $doc->numPages();

for my $pg (1..$pages)
{
   my $foo = $doc->getPageText($pg);
   my ($data) = $foo =~ m/$search\s*(\d+)/si;
   print "In $pg page: $search Value is $data\n";
}
__END__
Output is:
In 1 page: def Value is 20