Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb32b915f1b798d4…

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: 3746c9a9ee0c24033d345a351beaf45f SHA-1: 1c889ab13e8c7d03c28d5bf2729fa2b06f329df0 SHA-256: eb32b915f1b798d41f423fac4f6272ff5e09b7c3456afa7397846082ecfcff39
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The file is identified as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicating a potential attack vector. The presence of PDF-specific heuristics further supports the likelihood of a malicious PDF exploiting embedded scripts. The exact intent of the JavaScript could not be fully determined due to its nature, but it is highly probable that it is used to download and execute a second-stage 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
96e3a77a18b8d8656c449b4976c215f1c9b40f8b130dbab78080ed5bfb68b94e		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74935 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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