Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12a6feaf7b3fbb2…

MALICIOUS

PDF

307.9 KB Created: 2009-09-29 17:28:27 +08:00 Authoring application: PScript5.dll Version 5.2.2 (via Acrobat Distiller 6.0 (Windows))
MD5: 1d6c35286c9578d27e94198a67b2b56f SHA-1: 1a67953dc1892f431bfffac209a35728bbca0fa3 SHA-256: b12a6feaf7b3fbb2937c0d37716e1b90552974b4b672e9869d0b17ab039f88bf
318 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) to achieve code execution. The presence of multiple JavaScript streams and a secondary embedded PDF with suspicious findings indicates a multi-stage attack. The primary goal appears to be the execution of malicious JavaScript, likely to download and run a second-stage payload.

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-1960 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-1960
  • 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.
  • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0030_000.js
f6665a2b917420327cee75bc3142d96cc4e67dd9009946b609277cbcc4f01729		 pdf-javascript-stream PDF /JS object 30 at offset 0x4F9D 5079 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 0x4B8D9 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_off00044f86.pdf
1c6ce7a783be0494a1d54d06964f2958653bbb74017349b569d4c8659eeb8bee		 polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x44F86 32828 bytes
Detection
ClamAV: Pdf.Exploit.Agent-35646
Obfuscation or payload: unlikely

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