Eddy
3
There is no problem with avast.
avast is detecting them correctly.
Very likely it is a spambot that is sending them
https://www.reverse.it/sample/5f9bb22609cc1ff66ec4f521e78756e5218b7099bd3ce277ce1e0fea516b953a?environmentId=100
http://www.malware-traffic-analysis.net/2017/06/14/index2.html
etc.
There is nothing you can do about it.
It is like me sending you a email.
You can’t prevent me from sending it.