Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee4667d7796e968…

MALICIOUS

PDF

27.7 KB
MD5: 475d5e0af904c26ff4fe2bac51c1912c SHA-1: a00144d82757d751d5f28ac323da8189febe19d5 SHA-256: 8ee4667d7796e96845ec1340c1061ae29ce37af653a2f1ee378ca94c34312bc3
136 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings. The ClamAV detection of 'Win.Trojan.Agent-36100' strongly suggests malicious intent. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, which is a common technique for malware delivery. The document body content appears to be obfuscated or corrupted, providing no clear user-facing lure.

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
31a86fb1a231cb577665529254862a8d9287637c92a1eb7ae4097a4c56dedbb1		 pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 27621 bytes
Detection
ClamAV: Win.Trojan.Agent-36100
Obfuscation or payload: unlikely
legacy_pdfkit_stage_000.js
fbe63b9a2181cade9418792b9e83b1c5bd15c37440519f2126eb408f402433b8		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 15189 bytes

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