Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab69eb0ba432abdf…

MALICIOUS

PDF

27.8 KB
MD5: fb11d47b6cfa3207837c414dc7030696 SHA-1: 004e5507282c0bbeff89992c1d250ffecfd590c9 SHA-256: ab69eb0ba432abdfecf3b607504e1254a16b8ece20f42710731959f76d94416f
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and critical ClamAV detections identifying it as Win.Trojan.Agent-36100. Embedded JavaScript streams were extracted, indicating the likely execution of malicious code. The presence of JavaScript actions and embedded JS streams strongly suggests the document is designed to exploit vulnerabilities or trick the user into executing a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Win.Trojan.Agent-36100 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Agent-36100
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0008_000.js
35e2f8ebdc857cae2169c3a92e084e0d00dd881630eab6f9d83fc34c7db22c06		 pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 27717 bytes
Detection
ClamAV: Win.Trojan.Agent-36100
Obfuscation or payload: unlikely
legacy_pdfkit_stage_000.js
8dcd961ee85524078b7460468646ad511f1c367bfab70af80f37fbd56d65bdaa		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 15237 bytes

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