Malicious PDF — malware analysis report

Static analysis result for SHA-256 527864202acb4f54…

MALICIOUS

PDF

189.9 KB Created: 2009-09-17 09:09:59 +08:00 Authoring application: Acrobat Distiller 7.0 (Windows)
MD5: 91ebbca2bfab0c302c6a3c3ff20e02d8 SHA-1: 3fe56d649a4908380caa798e3a1a1a9b63c2c5c8 SHA-256: 527864202acb4f545e694cb049e26e207c34a14cdc71f8b2b519ed733f916abf
78 Risk Score

Malware Insights

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

The PDF document contains embedded JavaScript that exploits the CVE-2009-0927 vulnerability. The heuristic firings indicate that the JavaScript is obfuscated and likely used to download and execute a second-stage payload. The attack pattern is consistent with exploiting known PDF vulnerabilities to achieve arbitrary code execution.

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
382b8d1d4b8b37c17dd8b7c18d28ab2a2d67732c060e6d94a46c8b74f068ca5f		 pdf-javascript-stream PDF /JS object 17 at offset 0x4DA 2842 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
d5b6eacb375014d29fb285eda250e01d4af6c096a9123e18da1d2d93b8de4c7a		 deobfuscated-js JavaScript hex-escape property alias normalized stage at offset 0x4DA 2533 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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