MyBB Community Forums

Hello , in the site is found Malware.
I didn't add plugins from other site except the recommended one from MyBB. I am with latest version myBB.
I would be thankful for help, 
How to remove that Malware?

http://arrowgroup.ga/404testpage4525d2fdc
Location: https://arrowgroup.ga/404javascript.js
arrowgroup.ga
Redirects to https://infinityfree.net/errors/404/

Picture: https://prnt.sc/w90bq8

This is not malware. The linked resource can't be found so it displays an error page instead. In this case it redirects you to such error page.

If you are using free hosting be aware that free host providers usually implement specific strategies to let visitors know their service is being used, in this specific case it seems InfinityFree (iFastNet) is forcing its own error page.

Some free host providers might allow free tier clients to change error pages to use custom ones but they usually don't; paid host providers usually allow this for all paid clients.

I have 2 websites with different domains but both with same mybb look

This one using InfinityFree (very bad hosting) and i was thinking is malware , however i am not surprised ,that InfinityFree sucks ,very bad host. i just still have account there so i was wondering to check my old website and i found that haha

My second website which is not mentioned in the topic is paid hosting DreamHost and is really awesome. i am happy there ,