### 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 malicious file as a legitimate document, such as a PDF or Word document. Attackers may use social engineering techniques in the email to trick the recipient into opening the attachment, such as posing as a trusted source or creating a sense of urgency. Another method is to use macros within the document to execute malicious code when the document is opened.