PDF malware analysis — malicious · 9d317dfc745c0bc1

MALICIOUS

PDF

27.2 KB

MD5: 3331e2aab3057e25b0efdbb27a697b8b SHA-1: 94df8da0b6e5f7c6e3018e3269ee634e63c88828 SHA-256: 9d317dfc745c0bc1e63df81541e1b9046621baea25efe41184c75bcc85c7de87

134 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, which is flagged as malicious by multiple heuristics including a high-confidence ML classifier. The presence of ASCIIHexDecode and ASCII85Decode filters, often used for obfuscation in exploits, further supports this. The embedded JavaScript is likely used to exploit a vulnerability within the PDF reader to execute malicious code.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

Correlated malicious PDF JavaScript signals critical PDF_CORRELATED_MALICIOUS_JS

PDF JavaScript or auto-action content is corroborated by exploit staging, ML, or suspicious extracted-artifact findings. This correlation promotes old exploit-kit PDFs that otherwise remain in the suspicious band because each individual signal is intentionally weighted conservatively.
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85

ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation

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