Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7695809b1d41848…

MALICIOUS

PDF

14.6 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: c4bb46dc1eb0a11af0b7c36eab518825 SHA-1: 0cb8a78ffa64682369b33a4f4904939938e0e9ba SHA-256: c7695809b1d418488eabd56853aab3eef1930ecfa8d6309a8ff4f658b8835845
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript

The file is identified as a malicious PDF by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis detected embedded JavaScript, indicating an attempt to execute arbitrary code. The JavaScript stream is the primary mechanism for delivering the malicious payload.

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
36d0eb356483b2e38a875ada07ea56f618b016cf4093bc510d6e30651710359b
pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 75377 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely