MALICIOUS
60
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF is encrypted and contains a hidden button disguised as a screenshot, a common technique for phishing lures. The ML classifier strongly indicates maliciousness. The presence of an AcroForm button with an action trigger further supports the likelihood of a malicious link being embedded within the document, designed to trick the user into navigating to an external resource.
Machine Learning
- Nyx PDF Classifier malicious score 0.8955
Heuristics 3
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Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LUREPDF has 2 image(s), only 0 text block(s), carries a click-outward action, and is only 121 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
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AcroForm button with action trigger low PDF_ACROFORM_BUTTONPDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
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Encrypted PDF (string and stream contents are opaque to static scan) info PDF_ENCRYPTEDPDF declares /Encrypt — string objects and stream contents are encrypted with the standard security handler (RC4 or AES). On its own this is informational; legitimate encrypted documents include signed contracts, billing statements, and rights-managed material. Static heuristics cannot inspect encrypted payload bytes.
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