Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3e3bafb63957bd…

MALICIOUS

PDF

13.4 KB Created: 2008-08-02 11:25:13 +04:00 Authoring application: PScript5.dll Version 5.2 (via Acrobat Distiller 6.0 (Windows))
MD5: fd8b9c7f52d0e936a1ccf2e7347407df SHA-1: b0defa4eba7a6f44b9302e2e712c6c6aa494cd79 SHA-256: fa3e3bafb63957bdfad793c5cc192ab20f9cee2dbd4224c6c4d7ba88c870cc2f
118 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes the unescape() function and targets the Collab.collectEmailInfo method, indicating exploitation of CVE-2007-5659. This exploit is designed to collect email information from the user. The presence of obfuscated JavaScript streams further supports the malicious intent. No specific malware family could be confidently identified.

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. (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.
  • 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/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_obj0016_000.js
a57b424ce100da4aa84ee81f8350f9368c263ade7ac2d448f11e0ca1c028ff4a		 pdf-javascript-stream PDF /JS object 16 at offset 0x43D 5110 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 16 eval/decoder/string-building token(s).
stream_003_off0000230d.js
b5ba09264c453e6ea26221c74b8d20dbda7e6d374cf193467b0164fbf0f558e4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x230D 5098 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 16 eval/decoder/string-building token(s).

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