Malicious PDF — malware analysis report

Static analysis result for SHA-256 f998e2fc46202006…

MALICIOUS

PDF

27.7 KB
MD5: de1f9eef7370d2f08b08979f06932cde SHA-1: 3cdc907e2935906b80b333c3705b1b34bcfedb7e SHA-256: f998e2fc46202006732d0e38bc3b4e6b87399b16630cd2c0b57e471c3441e5d4
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was flagged by multiple heuristics, including ML classifiers and ClamAV, indicating malicious content. The presence of embedded and deobfuscated JavaScript streams strongly suggests the file's purpose is to execute malicious code. The ClamAV detection of 'Win.Trojan.Agent-36100' points to a known trojan, likely a downloader or agent.

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
f970ffd4440fee6f48e4bf0317f3c4f46f0cc49452a42e6eca004cea1f2fe7f8		 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
9690b226c20e37b8e8b4dad91e67f16d766df4be58b43cccd75f9a3911254ae5		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 15189 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.