Malicious PDF / .PHP — malware analysis report

Static analysis result for SHA-256 7ce2fe210e9eda8a…

MALICIOUS

PDF / .PHP

27.9 KB
MD5: dc24067b4156fadafeff082d39ff503c SHA-1: c5805ca8936531a3a1b3d28da6595dde93d0b5e0 SHA-256: 7ce2fe210e9eda8a8644032f0c51551a7c5d842e1f8c2edc63eac94c62c686e9
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The file is identified as a malicious PDF by multiple heuristics, including a high-confidence ML classifier and ClamAV detection. The presence of embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics, suggests the execution of malicious code. The ClamAV signature 'Win.Trojan.Agent-36100' points to a known trojan, likely responsible for downloading and executing a second-stage 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
100347e928c062bf4c9e107448ab8e9a7818e39de0aeaa41875c43cb99db5927		 pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 27765 bytes
Detection
ClamAV: Win.Trojan.Agent-36100
Obfuscation or payload: unlikely
legacy_pdfkit_stage_000.js
69ad65ac8572c15952739a69c56ac52185da13b606a22efd69c3fb4e5cd67fbe		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 15261 bytes

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