Malicious PDF — malware analysis report

Static analysis result for SHA-256 436c20f16094211b…

MALICIOUS

PDF

164.5 KB Created: 2008-03-20 15:51:33 +08:00 Authoring application: Acrobat 编辑器 8.0 (via Adobe Acrobat 8.1.0)
MD5: 7530959526c985ddf8a2580f51a64440 SHA-1: dc7bb0f27da04995700fdd0f18ec5f57cde5b905 SHA-256: 436c20f16094211b16eb047867a5c6d9f8175ab654165fba66bb649636a6fcb8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1559.001 Component Object Model

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability through the Collab.collectEmailInfo method. This indicates an attempt to exploit the vulnerability to gather user information, likely email addresses. The presence of JavaScript and the specific exploit firing strongly suggest this attack vector.

Heuristics 7

  • 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)
  • 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 file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0032_000.js
618d83a1ae0dcccc99302bdbd6bcd0f24f8b73242f00b9e1083269ecad9f5fab		 pdf-javascript-stream PDF /JS object 32 at offset 0x7DD 10668 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 9 eval/decoder/string-building token(s).

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