Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f7d660f27e3b8a…

MALICIOUS

PDF

438.1 KB Created: 2008-04-28 21:10:01 -07:00 Authoring application: Acrobat PDFMaker 6.0 for Word (via Acrobat Distiller 6.0.1 (Windows))
MD5: 217c5f833394f14d98eacfc0801c155c SHA-1: 6cf5c6284704182af125fa37c023a8eba7e6588a SHA-256: 44f7d660f27e3b8a3c9cd7ff35ea4cb1fae0eb4503520f13f656919b1162c6a3
240 Risk Score

Malware Insights

This PDF file is malicious, exploiting CVE-2007-5659 via embedded JavaScript. The JavaScript stream, named 'javascript_obj0024_000.js', is obfuscated and likely responsible for triggering the exploit. A secondary embedded PDF, 'polyglot_child_pdf_off0006b7be.pdf', was also found and exhibits suspicious static findings, indicating a multi-stage attack. The primary exploit targets a known vulnerability in Adobe Reader, leading to the execution of malicious code.

Heuristics 8

  • 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. (matched in decompressed stream)
  • Secondary embedded PDF body has suspicious static findings critical POLYGLOT_CHILD_PDF_STATIC_TRIAGE
    A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
  • ClamAV: Pdf.Exploit.Agent-35909 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-35909
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded 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/iX/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/pdfx/1.3/
    • http://ns.adobe.com/photoshop/1.0/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0024_000.js
93d194a7b5106dcaa9efa3d4d2c0b2828d8f0665b264c13f9ddd5c0cc32d07ec		 pdf-javascript-stream PDF /JS object 24 at offset 0x7E4 3404 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 17 eval/decoder/string-building token(s).
polyglot_child_pdf_off0006b7be.pdf
218086e5ad9655a42c4b7231f78f11920ade6229037adfba65e4b361b79c3670		 polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x6B7BE 8400 bytes

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