Olivia, a dissatisfied former employee of eccouncil video

Full Certification Question

Olivia, a dissatisfied former employee of TechInco Corp., made the choice to introduce fileless malware into TechInco's systems. To distribute the malware, she employed the email IDs of present employees, sending deceptive emails containing malicious links that appeared authentic. Upon clicking the link, the targeted employee is redirected to a deceptive website that automatically loads Flash and initiates the exploit. What technique did Olivia use to initiate the fileless malware on the target systems?