Contact Forms uses a website’s contact mechanism to generate dangerous email links as documented by SANS ISC

https://isc.sans.edu/forums/diary/How+the+Contact+Forms+campaign+tricks+people/28142/

Contact Forms” is a campaign that uses a web site’s contact form to email malicious links disguised as some sort of legal complaint.  We’ve seen this campaign push BazarLoader malware and distribute Sliver, but recently it’s been pushing IcedID (Bokbot).  Most of the time, the Contact Forms campaign uses a “Stolen Images Evidence” theme, with emails stating a supposed violation of the Digital Millennium Copyright Act (DMCA).