Hackers Use Malicious PDFs to Impersonate Microsoft, DocuSign & More via “Callback Phishing”

Hackers have stepped up a new phishing method that uses malicious PDF attachments to impersonate well-known companies like Microsoft and DocuSign. These fake PDFs encourage recipients to call phone numbers controlled by the attackers, pretending to be customer support representatives. This technique, called callback phishing or Telephone-Oriented Attack Delivery (TOAD), is becoming increasingly common. During […]