Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b98842979036e9…

MALICIOUS

PDF

14.5 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: 099f778cf9f61bd2409149f49368d6bd SHA-1: f97dea54bc58c9dad20879322814f6bca3064eba SHA-256: 57b98842979036e9b6f5b91721041873da7aaf90b5e1727705359978d696efd3
136 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections confirm this is a malicious file, specifically identified as Win.Trojan.Agent-36166. The embedded JavaScript is likely responsible for executing malicious code, potentially downloading further payloads or establishing a connection to a command and control server.

Heuristics 4

  • ClamAV: Win.Trojan.Agent-36166 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Agent-36166
  • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
36497a86c814538b381817a939adaa3cb5c92832ec1c4dc254992b1f179e6020
pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74952 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely