Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa69ffedf88742a0…

MALICIOUS

PDF

14.7 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: 8ee51313b895819fbf229ebf9e532f90 SHA-1: a7dbb72f56c9ed65e0549a42cf22bedbcf665118 SHA-256: fa69ffedf88742a0a303e635f4bcc797bd4c882cee00d28a52f4c09c6c21891c
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, which is a common technique for delivering malicious payloads. ClamAV detections for 'Win.Trojan.Agent-36166' on both the PDF and an extracted artifact strongly suggest malicious intent. The JavaScript action and embedded JS stream heuristics further support the execution of a malicious script. The exact nature of the payload is not detailed, but the overall pattern points to a downloader or dropper.

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
41147af569524a885a02564f612311f7dbe4a7ae3de3e7b28a9f9b1dc91b377a		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 76559 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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