#!/usr/bin/perl
use strict;
use warnings;
use Mojo::DOM;
use feature 'say';

# slurp from file, get from a live site via Mojolicious::UserAgent etc...
# hardcoded for example purposes

my $html = '<p><a href="https://example.com">example.com</a></p><p><a href=";widget=460" rel="noopener" target="_blank"><img alt="Advertiser" class="banner" height="60" src="/images/articles/newsletters/Paper-v4-468x60.jpg" style="display: block; margin-left: auto; margin-right: auto;" width="468" /></a></p>';

my $dom = Mojo::DOM->new( $html );

for my $url ( $dom->find('a[href^=";widget=460"]')->each ){
	$url->attr('href' => 'https://perlmonks.org');
}

say $dom->content;