I just realized that Google is indexing some weird URLs from my websites:
https://stephanie.elite02.com/lib/proudflesh
http://palladiumtechs.elite02.com/pdf/gruas
http://palladiumtechs.elite02.com/pdf/richelieu
…
I found the problem in the file wp-includes\random_compat\error_polyfill.php that the person is adding an include at the end of this file for example <?php @include_once(“/home/elite02/public_html/signworx/wp-content/plugins/revslider/admin/assets/imports/photography-carousel/slide1.php”); ?>
And I’ve deleted this include file and that line, but few days later the code is back…
How can I fix it? Is it a WP issue or server? I sent all wp-admin, wp-includes files but it’s still showing up few days later.