Malicious PDF — malware analysis report

Static analysis result for SHA-256 799c8ebb4e26cfb3…

MALICIOUS

PDF

377.1 KB Created: 2008-08-28 21:38:07 -07:00 Authoring application: Acrobat PDFMaker 6.0 for Word (via Acrobat Distiller 6.0.1 (Windows))
MD5: ebc1b8f01b2258cdfd46039ed877d706 SHA-1: 6715819b0631558e079d3725c3a8c0975c4e211c SHA-256: 799c8ebb4e26cfb3c36d17e95f8a166680dd71f59ded41bc5280429a20f401a7
212 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and exploits the CVE-2007-5659 vulnerability via the Collab.collectEmailInfo method. The ML classifier strongly indicates maliciousness. The presence of JavaScript and the specific CVE exploit suggest the document is designed to download and execute a second-stage payload, a common technique for malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 8

  • 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.
  • 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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PermissionError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/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_obj0032_000.js
32c06346e154a04692938c78af99d5406a5ab66779b7380a8c9a6535ea247b6b		 pdf-javascript-stream PDF /JS object 32 at offset 0x85B 8799 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 432 eval/decoder/string-building token(s).
polyglot_child_pdf_off0005c1ab.pdf
e6d4aaa0ce5b4ee862ac9e19743af62b66bc9c1fe85afd37b9d4c23e5ffbac7d		 polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x5C1AB 8939 bytes

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