Trojan-Downloader.Win32.Small.anh is a malicious program that infects computers with passwords. The downloader will install a range of other malicious programs on the victim machine. The person or group sending these messages is harvesting passwords from infected computers, and gaining full access to victim machines, which can then be used as spamming platforms. The message which the malicious program is attached to seems to be a forwarded message, complete with answer. The recipient is exhorted not to show them to any one.”]