An email poses to be a customer statement for a payment due. The sender asks the receiver to send a payment to settle a December Invoice. Once the user opens the attached document, a malicious macro will be executed. The malicious macro is detected as W2KM_DRIDEX.YYSQQ.
DRIDEX malware are known to use spam to spread to a number of users. For your protection, make sure that you have email filtering software enabled. In addition, do not open email attachments that are not from known or expected senders.