Malicious Word File Auto Downloads Additional Malware that automatically downloads another malicious file of a different format. Successful downloads lead to a remote access Trojan (RAT) infection. The dangerous feature of this vulnerability is that the link in the MSWord file gets updated without any sort of alert or warning to the user. By default, MS Word displays a warning: This document contains links that may refer to other files. Do you want to update this document with the data from the linked files? This exploit has somehow been able to suppress display of that warning.”]
Source: https://hackercombat.com/malicious-word-file-auto-downloads-additional-malware/