MALICIOUS
74
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1204.002 Malicious File
The ML classifier strongly indicates this PDF is malicious. Static analysis revealed the presence of JavaScript actions and embedded JS streams, along with the use of ASCIIHexDecode and ASCII85Decode filters, which are commonly used in PDF exploits. These techniques suggest the PDF is likely attempting to exploit a vulnerability to download and execute a second-stage payload.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
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ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEXHex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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JavaScript action low PDF_JAVASCRIPTPDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
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