Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ccd3b6d43014da…

MALICIOUS

PDF

138.5 KB Created: 2009-09-17 09:09:59 +08:00 Authoring application: Acrobat Distiller 7.0 (Windows)
MD5: 99d95c2352c191c1c86c0dee0037b84d SHA-1: 5e7b646a5c6e765f7cea5f97d09c2a0c2a6f6aa1 SHA-256: d5ccd3b6d43014dafd095519f11e33e78b0ab02ec5e178eea29f726ee4c9a27d
78 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages the CVE-2009-0927 vulnerability (Collab.getIcon). The heuristic firings indicate that this JavaScript is designed to be executed, likely to download and execute a second-stage payload. The document body is heavily obfuscated and does not provide clear user-facing text, but the presence of JavaScript and the specific CVE exploit strongly suggest a malicious intent to compromise the user's system.

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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