Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fba8813c1808fc4…

MALICIOUS

PDF

27.9 KB
MD5: db58fee62876117bc8d62e534142201f SHA-1: 4c2c80fafe33e666abbc277d036a1f09ff9ad346 SHA-256: 7fba8813c1808fc4a95bf47ae202c3d4f9f20e85e11c0f96a65df94cfd74c09a
166 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV with the signature Win.Trojan.Agent-36100. Static analysis revealed embedded JavaScript streams, indicating the PDF is designed to execute malicious code. The ML classifier also strongly indicated maliciousness. The embedded JavaScript likely downloads and executes 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
390ab37138393d583a3abd155e49b60abcee28062abc188e2a082e288b6e99aa		 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
df5abc4a0ab5f05bccd6263833457009052bc22ed10a69dafdf51fb9a29ec2bd		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 15261 bytes

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