Malicious PDF — malware analysis report

Static analysis result for SHA-256 351ec4bab163ac6b…

MALICIOUS

PDF

11.7 KB Created: 2010-07-25 10:32:51
MD5: 1afc04aabc1d80e6f10def67e550c4d0 SHA-1: e79e7a90270e849bfe2fa294f7c3cfed9103be8f SHA-256: 351ec4bab163ac6b53f0e7cdcc10a0dffcff57c5d6cfe4a7eb97f13c43aa086b
116 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript which is obfuscated but appears to be designed to download and execute a second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent. The JavaScript attempts to reconstruct a string using character codes and producer information, likely to form a URL or command for payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Pdf.Dropper.Agent-7417864-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7417864-0
  • 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
a7e18fd1563aa33b012672b749943f76345cae17fc065c5c1aae0d786099e329		 pdf-javascript-stream PDF /JS object 7 at offset 0x2AF7 588 bytes

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