PDF malware analysis — malicious · a8342fc5fac05725

MALICIOUS

PDF

35.9 KB

MD5: 8b182ed849af2a2b4779757d85fa83cb SHA-1: a2ec339034ecebcaea976a2f12eb57209f97b1f4 SHA-256: a8342fc5fac05725719aa7243a7b0eae2d7e47c5e8949b7bda59f1e45d2c59c3

134 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF contains embedded JavaScript and utilizes ASCIIHexDecode and ASCII85Decode filters, which are commonly used to obfuscate malicious code within PDF documents. A machine learning classifier strongly flagged this PDF as malicious, and correlated signals indicate the presence of malicious JavaScript. The primary attack vector appears to be exploiting vulnerabilities via this embedded script.

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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