### Comment:
What are some common techniques used to deliver malware through email attachments?

### REPLY:
One common technique to deliver malware through email attachments is to disguise the attachment as a harmless file type, such as a PDF or Word document. The malware can be embedded within the file, and when the recipient opens it, the malware is executed. Another method is to use social engineering techniques, such as crafting a convincing email that tricks the recipient into opening the attachment. Additionally, attackers may use file compression techniques to hide the malware within a zip file, making it harder to detect.