Malicious PDF — malware analysis report

Static analysis result for SHA-256 98276a5d5f847fe4…

MALICIOUS

PDF

58.1 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: 21012bd50ecc2c0421a74c0797ce7c15 SHA-1: 970dbaacfd54b7c511b750257a3068fa86e2d2df SHA-256: 98276a5d5f847fe450af56c1bfe4bd21359b9c64de0cdea02edc4bd71c748ee2
108 Risk Score

Malware Insights

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

The file is a PDF containing embedded JavaScript, as indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for PDF-based malware delivery. The specific ClamAV detection name 'Pdf.Dropper.Agent-7285015-0' is included as a primary IOC.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 3

  • ClamAV: Pdf.Dropper.Agent-7285015-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7285015-0
  • 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
15b2031ea56eeed8047cfd74e475f17b6083d8a879ecd776090ecb1ff7b32fa3		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 117121 bytes

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