I reversed your thought process---instead of .doc to .pdf, think .pdf "from" .doc. This was my first stab at it:

#!/usr/bin/perl

use strict;
use Text::FromAny;
use HTML::FromText;
use PDF::FromHTML;

my $tFromAny = Text::FromAny->new(
    file => '/root/Desktop/basic.doc');
my $text = $tFromAny->text;
text2html($text);

my $pdf = PDF::FromHTML->new( encoding => 'utf-8' );
$pdf->load_file(\$text);
$pdf->convert(
    FontUnicode => 'Helvetica',
    LineHeight  => 10,
    Landscape   => 1,
);
$pdf->write_file('/root/Desktop/target.pdf');
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