Malicious PDF — malware analysis report

Static analysis result for SHA-256 16da7f1ac0119a0f…

MALICIOUS

PDF

11.3 KB
MD5: fefc90eb456aee12752fa49b28324be4 SHA-1: 74182a1a16afb755f4a6e1d25895cd47e2bc6c7f SHA-256: 16da7f1ac0119a0ffa098964f00da16b431dc41979585b72be62d8152f88cdca
106 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript that is obfuscated but appears to be designed to download and execute a second-stage payload. The JavaScript function `dskp` reconstructs strings from hexadecimal character codes, and the main execution block calls `eval` on the reconstructed string, indicating malicious intent. The ClamAV detection and ML classifier further support the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Pdf.Exploit.Agent-36177 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36177
  • 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
a7e6203b0e8f812879ed8382ccbb3900ad81b5a92faf27692f51de6e8c96c13a		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A6 569 bytes

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