Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda11e22a5d7ef3a…

MALICIOUS

PDF

468.8 KB Created: 2008-04-01 00:54:55 -08:00 Authoring application: Acrobat Editor 8.0 (via Adobe Acrobat 8.0)
MD5: 845528656cdff11288d8e89dc065568c SHA-1: cb13950a54966ae453ba21c8c4d7cec59f45b4c5 SHA-256: bda11e22a5d7ef3a8351b8191ee8a2d871cf130b921afee44351efe9168dc927
126 Risk Score

Malware Insights

This PDF document contains embedded JavaScript and triggers a critical heuristic for CVE-2007-5659 (Collab.collectEmailInfo). The presence of JavaScript and the specific CVE exploit indicate an attempt to compromise the user's system upon opening the document. The extracted artifact 'javascript_obj0028_000.js' is also flagged as suspicious. The overall intent appears to be the execution of malicious code via a known PDF vulnerability.

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)
  • 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
  • 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/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_obj0028_000.js
85bbb578ca80e4fd8ae1f28f358b8310cca0e8e7e4ca6915a3c1617fa033d374		 pdf-javascript-stream PDF /JS object 28 at offset 0x77D 5089 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 16 eval/decoder/string-building token(s).

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