Malicious PDF — malware analysis report

Static analysis result for SHA-256 6546229f7240850a…

MALICIOUS

PDF

7.3 KB Created: 2010-09-16 18:52:20 Authoring application: Qabifagevafa (via fe463Tiqotezozav)
MD5: 3bfbde312a6f39fce105421c8cb3dce0 SHA-1: 932473419ecf041a5bc8bdc6b59975186f4eaa8f SHA-256: 6546229f7240850a4b64905756205a78d82ff28222fcdf422a29cb5586eaedf5
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, flagged by multiple heuristics and a critical ClamAV detection for obfuscated objects. The JavaScript code is heavily obfuscated and appears to be designed to download and execute a second-stage payload. The ML classifier also strongly indicates maliciousness. Given the nature of PDF exploits, it is highly probable that this file was delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 3

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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_obj0011_000.js
ff85b44f7d06834e69a161aee8e28b7340c56fef50ee1649100cb6f376ea5386		 pdf-javascript-stream PDF /JS object 11 at offset 0x1364 2324 bytes

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