: Check the actual email address behind the sender's name. Most of these originate from compromised accounts or random, nonsensical domains.
The "Download 591K zip" subject line is a known . It is designed to trick you into downloading a malicious file by using a vague, technical-sounding subject line. Why You Should Be Concerned Download 591K zip
: Do not click any links or download the attachment. Even "previewing" some files can be risky depending on your mail client's settings. : Check the actual email address behind the sender's name