Hi Citra, unfortunately that page is not very useful, it's just a rabbit-hole of links and "possible" solutions. There's no way I have the time to go through all this and implement the steps.
You can attempt to manually locate and remove the malicious code. Even the chances of an expert being able to completely clean your site are poor. Someone can spend days looking through files, removing small snippets of hacker code. If they miss one bit, the entire hack can be replaced by the hacker in a second once the site goes online
There MUST be an easier way...
Please :(