### 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 such as a PDF or Word document. The attacker can also use social engineering techniques to trick the recipient into opening the attachment by making it appear urgent or important. Additionally, attackers can exploit vulnerabilities in email clients to automatically execute malicious code once the attachment is opened.