Malicious PDF — malware analysis report

Static analysis result for SHA-256 a027ae3e2c6e53a4…

MALICIOUS

PDF

91.6 KB Created: 2008-05-27 21:06:43 -07:00 Authoring application: Acrobat PDFMaker 6.0 for Word (via Acrobat Distiller 6.0.1 (Windows))
MD5: 451ac46d427e9178999ef60a9a68d861 SHA-1: 9ca13b109935ceb7ad17eab9a3a6d176f5e0e0e2 SHA-256: a027ae3e2c6e53a450a44ea49ec1bfb4c04aa178bbd5b5f41c3c6727fb6dfd74
336 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

This PDF file contains embedded JavaScript and exploits the CVE-2007-5659 vulnerability. The embedded JavaScript stream, identified as 'javascript_obj0025_000.js', is likely responsible for the malicious activity. A secondary embedded PDF was also found with suspicious static findings, indicating a multi-stage attack. The ClamAV detection 'Pdf.Exploit.Agent-35909' further confirms its malicious nature.

Heuristics 9

  • 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-35909 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-35909
  • 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.
  • 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 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/pdfx/1.3/
    • http://ns.adobe.com/photoshop/1.0/
    • 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_obj0025_000.js
9bdbfa5df6f827ff63cd61e1f8d58420b7f4b59844725102d812651a2abe8b1e		 pdf-javascript-stream PDF /JS object 25 at offset 0x7FC 3404 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 17 eval/decoder/string-building token(s).
polyglot_child_pdf_off00014d52.pdf
aea6fe86f6b0724783e65e57ed0ae891a7c4dd59d4b7154c37be43a2b5336a0e		 polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x14D52 8461 bytes
Detection
ClamAV: Pdf.Exploit.Agent-35909
Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.