sub check_file {
  my $file = shift;

  my $pdf = PDF::API2->open($file);

  my %info = $pdf->info;
  print "\n*File: $filename\n";
  foreach my $key (sort keys %info) {
    print "$key ->";
    print narrow_char($info{$key});
    print "\n";
  }
  open (FILE, $file);
  binmode(FILE);
  print "MD5 Checksum: ",Digest::MD5->new->addfile(*FILE)->hexdigest, "\n";
  close(FILE);

  my $size = (stat("$file"))[7];
  my $orig_size = $size;
  if ($size < 1024) {
    print "Size: $size bytes\n";
    $size = undef;
  }
  if ($size) {
    $size = int($size / 1024);
    if ($size && $size < 1024) {
      print "Size: ~$size KB ($orig_size)\n";
      $size = undef;
    }
  }
  if ($size) {
    $size = int($size / 1024);
    print "Size: ~$size MB ($orig_size)\n";
  }
}