If this is the storm warning issue 230 killed in Europe, etc. there are always going to be this type of social engineering attempt to get people to open emails and attachments or click links, etc. So the usual common sense approach applies don’t open unsolicited emails, attachments or click links on the same unsolicited email.

Whilst there doesn’t seem to be a direct identification by avast don’t forget that even without it avast did alert you to the suspicious attachment. Before avast can do anything it first has to obtain a sample and there is no cross anti-virus company co-operation in the sharing samples.