Malicious PDF — malware analysis report

Static analysis result for SHA-256 8caf462dd3074e19…

MALICIOUS

PDF

1.4 KB
MD5: 5f1c54181a17e7b4cc025153ad779e74 SHA-1: 3afb09a771bd17cd7de2199010b91aac492d0d79 SHA-256: 8caf462dd3074e1926f4de884210e4e5f9099504d56ed46e1dbd5b2bf7e299ad
114 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, flagged by multiple heuristics and a critical ClamAV detection as Pdf.Dropper.Agent-7281019-0. The ML classifier also strongly indicates maliciousness. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, a common dropper technique. The document body content is unreadable, but the technical indicators are sufficient for a high-confidence assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Dropper.Agent-7281019-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7281019-0
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
1bc4bf38a788adcc495fb84f1f085cb4c62f9f214ddac09c9e3dd447973e35e6		 pdf-javascript-stream PDF /JS object 7 at offset 0x1CC 254 bytes

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