Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c3fa66824d94c6…

MALICIOUS

PDF

235.6 KB Created: 2009-07-30 17:13:13 +08:00 Authoring application: PScript5.dll Version 5.2.2 (via Acrobat Distiller 6.0 (Windows))
MD5: 49975376812e3de4e350c63af9177354 SHA-1: e7ddd3b729296ac4b71fb51cf8fe9c87f1498ea6 SHA-256: 99c3fa66824d94c6c48fbed4752fbf6eda88cd0dd217dc7afd3a5c82f3615944
336 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

This PDF file contains embedded JavaScript and exploits known vulnerabilities (CVE-2009-0927 and CVE-2007-5659) related to PDF object handling. The presence of these exploits and JavaScript strongly suggests an attempt to compromise the user's system, likely by downloading and executing a secondary payload. The file was detected by ClamAV as Pdf.Exploit.Agent-35646.

Heuristics 9

  • Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927
    PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (matched in decompressed stream)
  • 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-35646 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-35646
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Suspicious extracted artifact medium 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/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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0045_000.js
124dac1f17a6b2b3af1ecd4e70b95830c379c75268d1e5151b467324c6bc897d		 pdf-javascript-stream PDF /JS object 45 at offset 0x52A8 5081 bytes
Detection
ClamAV: Pdf.Exploit.Agent-35646
Obfuscation or payload: unlikely
javascript_obj0051_001.js
2b11dd708aa56c68c96f9840aad20b570c8c1d2a148d2baf32bd6974f8029b8b		 pdf-javascript-stream PDF /JS object 51 at offset 0x39764 5499 bytes
Detection
ClamAV: Pdf.Exploit.Agent-35646
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
polyglot_child_pdf_off00032e11.pdf
1c6ce7a783be0494a1d54d06964f2958653bbb74017349b569d4c8659eeb8bee		 polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x32E11 32828 bytes
Detection
ClamAV: Pdf.Exploit.Agent-35646
Obfuscation or payload: unlikely

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