Microsoft Office had several security updates in July and August. All users should be careful of suspicious documents, apply the latest service packs, and install all Office updates.
MS06-047: Trojan.Mdropper.N - Exploits Word vulnerability patched in August
http://www.symantec.com/enterprise/security_response/writeup.jsp?docid=2006-081616-2104-99
QUOTE - Trojan.Mdropper.N is a Trojan horse that exploits the Microsoft Visual Basic for Applications Document Check Buffer Overflow Vulnerability (as described in Microsoft Security Bulletin MS06-047) and attempts to drop a file on the compromised computer. The Trojan is a Microsoft Word document reportedly named: syosetu.doc