Malicious PDF — malware analysis report

Static analysis result for SHA-256 84a45b95db2ea234…

MALICIOUS

PDF

15.1 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: 63d3415a9e963be71393671a4c0116f2 SHA-1: 8920386a46f96d64d92dc04eb2618bb4146efc14 SHA-256: 84a45b95db2ea23476382933a3c131f6b7ba2fc8c58493a35ff4546cf51287d2
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was detected as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicating the document is designed to execute malicious code. The JavaScript's purpose is likely to download and execute a second-stage payload, which is a common technique for malware delivery.

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
23a081df6ada0442586ad77dc077ec7fc2033e809af3b7577a0e692814b37406
pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 84194 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely