Malicious PDF — malware analysis report

Static analysis result for SHA-256 f74bcced8d1573c5…

MALICIOUS

PDF

140.7 KB Created: 2009-09-17 09:09:59 +08:00 Authoring application: Acrobat Distiller 7.0 (Windows)
MD5: 692bf9d2cba7761d7c929615b04ea8c0 SHA-1: a3dcb1081e39a0347fa57682b18f55a9d76bb02f SHA-256: f74bcced8d1573c593be5394e63ab69dcc85ccdf337a2e6c47c9f9062d0d1bb3
78 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript T1204.002 Malicious Link

The PDF file contains embedded JavaScript, which is triggered by the CVE-2009-0927 vulnerability (Collab.getIcon). The heuristics indicate that this JavaScript is used to execute further code, likely to download and execute a second-stage payload. No specific malware family could be identified, but the attack pattern is consistent with PDF-based exploit delivery.

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. (identified after JavaScript deobfuscation)
  • 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/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdfx/1.3/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0017_000.js
80b866f827da1c58c9486f9e74f3ddf67d4b0cdb1efa42473d1985daa759d091		 pdf-javascript-stream PDF /JS object 17 at offset 0x4DA 2823 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
js_property_alias_stage_000.js
733b2b2f56f466b970726f7d78e21c16d0d0871548c052e64e0818c613cb9443		 deobfuscated-js JavaScript hex-escape property alias normalized stage at offset 0x4DA 2514 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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