Malware spam: "New Doc 115" / "Sent from Yahoo Mail on Android"

This rather terse spam has a malicious attachment:

From:    admin [ali73_2008949@yahoo.co.uk]
Date:    10 February 2016 at 10:16
Subject:    New Doc 115

Sent from Yahoo Mail on Android

The sender's email address varies from message to message. Attached is a file New Doc 115.doc which is reportedly identical to the one found in this spam campaign.