Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf6cd8af90a7289…

MALICIOUS

PDF

14.5 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: 0608d2ff4f7196a4642e65124952a265 SHA-1: 5040cc8dfea4996e886f05915bfb60c769e1dc4d SHA-256: bcf6cd8af90a72890f576fbe0a1886084ce408c53d315a3b9dbca56c14f3ca00
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

This PDF file was flagged as malicious by multiple engines, including a critical ClamAV detection for 'Win.Trojan.Agent-36166'. Static analysis revealed embedded JavaScript, indicated by the 'PDF_JAVASCRIPT' and 'PDF_JS' heuristics. This JavaScript is likely responsible for downloading and executing a secondary payload, a common technique for malware delivery. The ML classifier also strongly indicated maliciousness.

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.

FilenameKindSourceSize
javascript_obj0007_000.js
79d0fa4b310c14a41954b9028c5454eb83504bc828877c7e92987e330f450e7c		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74452 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.