Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d37411d97900d16…

MALICIOUS

PDF

14.9 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: d145b7dd274293914c414c226d7c005a SHA-1: b33b0ec15e0adb84ceff6dc599e2479cfa866dca SHA-256: 1d37411d97900d16f06853c5f1cc9a65f22fbcdf7dfb6f5b696644d74e8bebd4
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 identifying it as Pdf.Dropper.Agent-7236276-0. Additionally, ClamAV detected a malicious artifact extracted from the PDF as Win.Trojan.Agent-36166. The presence of embedded JavaScript and ML classification further support its malicious nature, indicating it likely acts as a dropper for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Dropper.Agent-7236276-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7236276-0
  • 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
1dbe638dadc33a68403b79a55a4558abdeb503c2cdc0bd494561e4c54e7f2a55
pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 83593 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely