Spam traps have been seeing a widespread attack posing as a communication from Western Union. The emails have a subject line of Western Union Transfer MTCN: and an attached file. The attached file contains a malicious Trojan horse, as it contains a Trojan horse. The malicious emails append some text to the bottom of each message to make it appear as though your mail gateway has scanned the message and determined it not not the message is not according to the Naked Security website.”]
Source: https://grahamcluley.com/open-western-union-transfer-email/