I would check all the descriptions and anything that has been added to the page in question. I had a similar issue and found it in one of the course descriptions (and in several places within the course). View the source on the page where the link is showing up and search for the code there. It should point to where the code has been inserted.
Security and privacy
My Moodle site infected with malware: how to fix it?
This discussion has been locked because a year has elapsed since the last post. Please start a new discussion topic.