PDF malware analysis — malicious · d7c3906843a9794c

MALICIOUS

PDF

3.8 KB

MD5: aa82e56613c5c9d19a979d332546ee58 SHA-1: a1731d594fed130acd55379cf82a6a95632812e3 SHA-256: d7c3906843a9794c360fe397d704a03f0b06cd780ba540288264801d969b8a01

142 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it contains an exploit. Heuristics indicate the presence of embedded JavaScript, likely obfuscated using ASCIIHexDecode and ASCII85Decode filters, and employing String.fromCharCode. The primary attack vector appears to be a PDF exploit targeting the document viewer to run arbitrary code.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Agent-36178 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36178
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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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