Malicious PDF — malware analysis report

Static analysis result for SHA-256 7954736b4dfc5111…

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: 8912002cbe3269c63900f865a141219c SHA-1: e0d1d0700ae15eae1a61859280baef426c49f663 SHA-256: 7954736b4dfc51119fcbd50c33d6a3f0a2b8aaf9ae63ba71da320541c1715a65
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 (Win.Trojan.Agent-36166) confirm the malicious nature of the file. The embedded JavaScript is likely responsible for exploiting a PDF vulnerability to execute malicious code, as suggested by the T1204.002 technique. The specific JavaScript payload could not be fully analyzed due to its size and potential obfuscation, but its presence is a strong indicator of malicious intent.

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
bf5cafa21bc0782a6510a67b9cd2e87dbb5857980b2521a79d14da3828f0fbdc
pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74821 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely