Summarize this content to a maximum of 60 words: Hackers are increasingly using PDF attachments to impersonate major brands in phishing campaigns, according to new research from Cisco Talos.

NIST NCCoE Cyber AI Profile Virtual Working Session Series: Securing AI System Components
Join the NIST NCCoE soon for a series of virtual working sessions to provide input on the NIST Cybersecurity Framework (CSF) Cyber Artificial Intelligence (AI)