PDF malware analysis — malicious · 1a26ad9fc2b882af

MALICIOUS

PDF

3.8 KB

MD5: 972a8a52c5a53735b92d75d3d63dcae1 SHA-1: 95743e8d59c9cf0a9b700190016fec31edbe59a2 SHA-256: 1a26ad9fc2b882afa8320ead0bf04a73ef2599dd760eabcedbc25f4103f0fb5d

142 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV detection as 'Pdf.Exploit.Agent-36178'. The presence of JavaScript actions, embedded JS streams, and the use of ASCIIHexDecode and ASCII85Decode filters indicate an attempt to obfuscate malicious content, likely an exploit. The ML classifier's high confidence score further supports this assessment.

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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