Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e23b2df9c2c3b5…

MALICIOUS

PDF

89.4 KB Created: 2009-04-02 08:22:19 +08:00 Authoring application: Acrobat PDFMaker 7.0 for Word (via Acrobat Distiller 7.0 (Windows))
MD5: 6bf7b2b925c6b7b784474da21896f491 SHA-1: cb8f663b3def7971237c352f6552fe9e0930b70a SHA-256: 99e23b2df9c2c3b50b4cebb28042b67ce45d5c33bd63a0ef1177f235a5274bef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment T1204 User Execution

This PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability. The script is obfuscated but appears designed to execute arbitrary code, likely downloading and running a second-stage payload. The presence of JavaScript actions and streams, along with the specific CVE firing, strongly indicates an exploit attempt.

Heuristics 6

  • Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659
    PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
  • Suspicious extracted artifact high 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.
  • 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/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_obj0026_000.js
349330637e8e8a782a5b7a5950e3043b97c433e44839b437396870f4630ec450		 pdf-javascript-stream PDF /JS object 26 at offset 0x14D1E 3930 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 16 eval/decoder/string-building token(s).
js_property_alias_stage_000.js
de5a373b463840cf8d84d2b2bca2d14996cf9c6ede4add49783ddcd6c0a8cd19		 deobfuscated-js JavaScript hex-escape property alias normalized stage at offset 0x14D1E 3882 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 16 eval/decoder/string-building token(s).

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