PDF malware analysis — malicious · bc8d0bc78b27a991

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: 030a3f2783486c9bd9f9922f8d77d49d SHA-1: 30e43765f7bd44ad6a08f14bf10d2aeae35fd276 SHA-256: bc8d0bc78b27a9919e57d8a2b88228c26bcc1a2e345931d48b788defe4852582

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Win.Trojan.Agent-36166'. Embedded JavaScript was also detected, indicating the potential for malicious script execution. The ML classifier also provided a very high confidence score for maliciousness. The primary attack pattern involves the use of embedded JavaScript within the PDF to deliver a malicious payload.

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` `ed68855273f673c80e8e7f551453d260d43ab6bfc5f018c32094240bf2693171`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74543 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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