Malicious PDF — malware analysis report

Static analysis result for SHA-256 4491986af55744bf…

MALICIOUS

PDF

47.4 KB Created: 2006-02-16 15:03:51 -08:00 Authoring application: Acrobat PDFMaker 7.0.5 for PowerPoint (via substr)
MD5: a94790739eaf13dbd9367db48dd578db SHA-1: c6ac05dd867baa19ccdc3f779ac9594fa9778f68 SHA-256: 4491986af55744bf1c3380e426c14f043c5358c9beca892a7731e50d27ef300d
106 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV (Pdf.Exploit.Dropped-94) and a machine learning classifier. Heuristics indicate the presence of JavaScript actions and embedded JS streams, suggesting the PDF is designed to execute malicious code. The ML classifier's high confidence score further supports its malicious nature. The embedded JavaScript likely attempts to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Pdf.Exploit.Dropped-94 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-94
  • 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_obj0076_000.js
4733b9b8f00c680295a5a55b7174aa0e94e095c7d2aa689683f55b47abb4683f
pdf-javascript-stream PDF /JS object 76 at offset 0x99C 45801 bytes