Need advice on how to clean Cache in Wordpress

Question

caching

A malicious code in js files has settled on the site.
I rummaged through all the folders on the disk - the files are clean, but when accessed through the face, there is /wp-content/plugins/wp-polls/polls-js.js.

Where to dig?

Answer 1

As if there is no cache in it ... (unless, of course, some kind of caching plugin was installed)
Most likely the problem is in the theme files, usually all sorts of nastiness climbs there. And are you sure that js is not loaded from a third-party server?

Answer 2

the same get along caught, it seems.
Even reinstalling WordPress through the admin panel does not help (like, rearranged itself).
I contacted the support to fix it, because there is one-click install and it's hemorrhoids to rearrange the handles.