I usually scan my websites every week for potential attacks and threats. A friend of mine recommended this plugin because my software was fake, and it was adding links to my sites. Through this plugin, I was able to detect and remove malicious code. It really helped me a lot. If you also have unwanted links and codes on your sites, this PHP script will do the job. You just need to upload the file and run it as site.com/scanner.php. It's very easy to use; I usually check all the options since malicious codes can be found in most functions.
DOWNLOAD : https://www.mediafire.com/file/nwlum5twlkpmbp3/scanner.php/
VIRUSTOTAL : https://www.virustotal.com/gui/file/7adf7ab989cf3e890a9a1452527e79b12db79dbc3e9568302b60c52ed498a270?nocache=1
DOWNLOAD : https://www.mediafire.com/file/nwlum5twlkpmbp3/scanner.php/
VIRUSTOTAL : https://www.virustotal.com/gui/file/7adf7ab989cf3e890a9a1452527e79b12db79dbc3e9568302b60c52ed498a270?nocache=1