Scammers are once again abusing PDFs to trick victims into calling fake support numbers

Woman working at a contact center.

• Cisco Talos warns of callback phishing scams on the rise
• Phishing emails come with PDF attachments, in which are phone numbers
• Threat actors are exploiting people's trust in phone calls

Security researchers from Cisco Talos have warned of an ongoing phishing campaign in which victims are tricked into calling the attackers on the phone.