Pastebin redirect

Hi, I have a problem with my site. From 1 week my homepage load only a text menu without graphic. I tried to load wp backend, but it didn’t load. So I have restored a backup: it worked fine and the site was fine, but after one days the situation was the same.
So I checked the script in home page and I found it load from “https://pastebin.com/raw/V8SVyu2P?” instead from my site.
I updated siteurl value in wp_options table form https://pastebin.com/raw/V8SVyu2P? to https://www.frypperi.it. It works fine and the site was ok…but after another day, the situation was came back.
So what can I do?
I checked the site with https://sitecheck.sucuri.net and first time (when the site was down) it told me it was hacked, but after update it told it was fine!
I insalled also Wordfence and IthemeSecurity but the say I’m fine…

Thank you for help!
Mauro

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