This will probably be my first time to do disavow, but before I do that I wanna ask opinion from fellow BHW. So one of my site was losing rank since Dec 15th, and I thought it was because of the algo update, but now GWT has detected this backlink out of nowhere. This website actually pointing to one of my backlinks, but what happens is it copies the whole thing, so my website has now direct link to this spammy site. Although that new backlink has zero value on Ahrefs, that spammy website carries some virus too. It doesn't have any contact form or email. Google did not send me any manual actions, seeing that it is just one. My main concern is the ranking. So should I disavow it?