Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e7e4f7d62f9071f…

MALICIOUS

PDF

27.7 KB
MD5: 7bbbf205bcf73149040d0d78b87c114f SHA-1: 040df82aafb362104d2fbe66c4ac1fa3c8861b73 SHA-256: 2e7e4f7d62f9071f7c752e98af969c35bdac93edcb777d6ab1f1e13d683254c6
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, flagged by multiple heuristics. The ClamAV detection indicates a known trojan, Win.Trojan.Agent-36100. The obfuscated JavaScript is likely responsible for downloading and executing a secondary payload, contributing to the malicious verdict. The document body content appears to be malformed or encoded, 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
57a4981dadee217ffed3da36b8e00d02da9ea486ef805529742f02aa710f6571		 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
6ed228475e47220ef433d0299c9fa209a9effec59c7ac7c6264c329fa00443fd		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 15189 bytes

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