Malicious PDF — malware analysis report

Static analysis result for SHA-256 922cd02654c83c09…

MALICIOUS

PDF

7.1 KB Authoring application: Wezolokofecpo (via 91e07Nworeticakebi)
MD5: 71f1bed7e4ec5905f96a06822d34968d SHA-1: 670f5d1eced7683b8603503d7cb005932622bac0 SHA-256: 922cd02654c83c09ce1221e622a998dfa800ff8b6c0dd060598e56bfae0b37a9
76 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV with 'Heuristics.PDF.ObfuscatedNameObject', indicating a high likelihood of malicious content. The presence of embedded JavaScript, detected by 'PDF_JAVASCRIPT' and 'PDF_JS' heuristics, further supports this. The JavaScript stream is obfuscated, making its exact function difficult to determine, but it is likely designed to download and execute a secondary payload. The authoring application 'Wezolokofecofecpo' is also suspicious.

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
437a5d40b54247c17dfb3ac60e39d3ecfad672a269694af1851a077d9726a8d2		 pdf-javascript-stream PDF /JS object 11 at offset 0x1342 2272 bytes

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