Hacking & Backdoor

1. The following file (index.php) is changed at my cpanel file manager.

When I delete the index.php file from file manager it generate automaticaly with the code belongs to right side of the picture.

2. Wordfence cant rapair this core file

When we try to repair the index.php file from wordfence then the following dialog is apearing but not repairing the file.

The page I need help with: [log in to see the link]