PDF malware analysis — malicious · 533e935df9891d97

MALICIOUS

PDF

14.4 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)

MD5: ed07263094e7434c16cb2a6016e1823e SHA-1: f9a4747474e6115a08ee4ad64e8ac3f4d4e60c86 SHA-256: 533e935df9891d9715521e6c0556031c4e0764c14900310c84a340fc34cb3f8f

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for Win.Trojan.Agent-36166. An embedded JavaScript stream was extracted, which is a common technique for delivering malicious payloads. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be the execution of this embedded script.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Win.Trojan.Agent-36166 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36166
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `73099cf4d81a1338c8a31a2cc9b54c43a7b4b24be19bf23895f4c986f96f19e4`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74348 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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