Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6bd4e08765611ea…

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: 017221c7f5e94a9e97c2225df87536e5 SHA-1: d0f4907c1e0ffdcca2b65a5d8862c1193e00b672 SHA-256: c6bd4e08765611ead09516a1f82f4392757529c916af8111c1e6c1bf31215c07
136 Risk Score

Malware Insights

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

The file is a PDF containing embedded JavaScript, as indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections (Win.Trojan.Agent-36166) confirm its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for malware delivery. The large size of the JavaScript file suggests complex or obfuscated code.

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
1b06813b0da8600ad887f14d67b89055be95caeb5a06695405d32ddea95cad41
pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74948 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely