Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e1f3da36080261…

MALICIOUS

PDF

7.3 KB Created: 2010-09-16 18:52:20 Authoring application: Qabifagevafa (via 8fed9Tiqotezozav)
MD5: 6b61e9ad6632ff8d34e2cbce9db356ac SHA-1: 620215ca9b144d00f4c849b8e9800ba8accf1da3 SHA-256: 63e1f3da3608026146d1617763797246d57476fc1ca3416138d34fa536d86af0
106 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, flagged by multiple heuristics including ML_NYX_PDF_MALICIOUS and ClamAV's Heuristics.PDF.ObfuscatedNameObject. The JavaScript is heavily obfuscated, making its exact function difficult to determine, but it is highly probable that it is designed to download and execute a secondary payload. The presence of JavaScript within a PDF strongly suggests it 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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