Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1532c9e88cead8d…

MALICIOUS

PDF

13.1 KB Created: 2011-11-02 19:21:39 +04:00 Authoring application: Adobe Acrobat 10.0 (via Acrobat Web Capture 10.0)
MD5: b2a9b28f0e1ab5a7ba1ae86aa62326d1 SHA-1: 07e799584b0bf02e0fdcc16e6858f14633888466 SHA-256: e1532c9e88cead8dfc97ecb6ed8ffeb1af4e8a80c266f10e844b8ef0ddba7f32
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/Shell Script Execution: JavaScript

The PDF contains embedded JavaScript, indicated by multiple heuristic firings and the presence of a javascript_obj0024_000.js artifact. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the exploitation of a PDF vulnerability to run this script. The script's exact function is not fully discernible due to obfuscation, but its presence is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-36776 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36776
  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0024_000.js
927262ddeb1d1511ae200f0e2f667a4eba201eb17cf80e061b94679e24d635e0		 pdf-javascript-stream PDF /JS object 24 at offset 0x2617 11391 bytes
icc_00_off000018a6.icc
653b586c4707574ffcd648ba35494daed2c76ceafcf4c07d315ed961b1dc347f		 pdf-icc-profile PDF ICC profile at offset 0x18A6 408 bytes
icc_01_off00001a00.icc
2b3aa1645779a9e634744faf9b01e9102b0c9b88fd6deced7934df86b949af7e		 pdf-icc-profile PDF ICC profile at offset 0x1A00 3144 bytes

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