Try this, it works well for me, enjoy!

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

my $infile = "?.pdf"; #the pdf file you want to extract
my $outfile = "out.txt";

open (OUTFILE, ">>out.txt") or die("cannot open file : $!");

my $pdf = CAM::PDF->new($infile) || die "$CAM::PDF::errstr\n";
my $num = $pdf->numPages();
foreach my $p (1..$num) # p present for the page number
{
my $str = $pdf->getPageText($p);
CAM::PDF->asciify(\$str);
print OUTFILE "$str\n"; # write to file
}
close (OUTFILE);
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