Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0dcbd41cf5350e7…

MALICIOUS

PDF

27.7 KB
MD5: 793cf38e200249a2e9c2627e6bb4861d SHA-1: 0c98ef5fb3ed7d5e0990a27173d5a290f8ea14ca SHA-256: d0dcbd41cf5350e72e605d2c4255cd44e3fb35f1615ade7f06cc184562740123
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections (Win.Trojan.Agent-36100) confirm its malicious nature. 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 is obfuscated and does not provide clear user-facing lures.

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
bd43cbe5e26ff529421a7528f7a4c8fb182727ba187f4af1c636e8cd73bf8ed6		 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
cb215521974f3478e733ba66d17efa811be5c8896ea8f5eb22d1ad369dee7e2a		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 15189 bytes

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