Malicious PDF — malware analysis report

Static analysis result for SHA-256 339b1884ffcb3f2f…

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: af030d280281bbf17cd63813c23b7d4f SHA-1: 1b3a934aa361049f40a4a9e174b3c280cf160f22 SHA-256: 339b1884ffcb3f2fd92c4859cfab4cfc677e13c858978ed0948cc19cbf7490b8
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/Shell

The critical ClamAV detection and ML classifier flagging strongly indicate malicious intent. The presence of embedded JavaScript, identified by heuristics, suggests an exploit is being leveraged. The JavaScript action is likely designed to download and execute a second-stage payload, although the specific actions are not fully discernible from the provided evidence.

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
4f934a49f76830151fe20fc2e02d851aae8a0266912a1624404bcb95bbcf2772		 pdf-javascript-stream PDF /JS object 24 at offset 0x2617 11394 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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