Malicious PDF — malware analysis report

Static analysis result for SHA-256 7098c12722973b2a…

MALICIOUS

PDF

84.6 KB Created: 2009-06-26 16:25:57 +08:00 Authoring application: Acrobat PDFMaker 7.0 for Word (via Acrobat Distiller 7.0 (Windows))
MD5: f13242e9eed52cc0505c3e2f1eb67383 SHA-1: 44fd2a16f77d62f9bb02fdda1a42e25f54463af8 SHA-256: 7098c12722973b2ae4d2851937077035b0e95acafa9e0ba8b572bea6db569b8d
110 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF sample contains embedded JavaScript that exploits the CVE-2009-0927 vulnerability, specifically targeting the Collab.getIcon method. The JavaScript is obfuscated and likely serves to download and execute a secondary payload. The ML classifier strongly indicates maliciousness, and the exploit technique is well-defined.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927
    PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (matched in decompressed stream)
  • 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.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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/pdf/1.3/
    • http://ns.adobe.com/pdfx/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/photoshop/1.0/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0048_000.js
63643e753d94c15631c409e5ce426a4c916b1bb3171aab5406183844e2ae17d3		 pdf-javascript-stream PDF /JS object 48 at offset 0x50B 1845 bytes
javascript_obj0048_001.js
7d31d758d75aee000d516bd030797604a137231b9c60e8bb47c5587eadf0d52c		 pdf-javascript-stream PDF /JS object 48 at offset 0x550 3658 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).

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