Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac43fad7d3f71b7…

MALICIOUS

PDF

110.4 KB Created: 2008-05-21 16:10:52 +08:00 Authoring application: Acrobat PDFMaker 6.0 for Word (via Acrobat Distiller 6.0 (Windows))
MD5: ff7824c7e7e94d40bb6d7523bfe9aa50 SHA-1: c343a0ae2bc790529785ca850cf09e423c0f4fcd SHA-256: 1ac43fad7d3f71b71ad01159e0d01be5f038d0671a8432290620702809e64c11
72 Risk Score

Malware Insights

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

The PDF file exhibits multiple suspicious characteristics, including embedded JavaScript and a secondary embedded PDF. The presence of these elements, particularly the embedded JavaScript stream and the secondary PDF, indicates a potential attempt to execute malicious code or exploit vulnerabilities. The high heuristic score for the secondary embedded PDF further supports this assessment.

Heuristics 6

  • Secondary embedded PDF body has suspicious static findings high 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.
  • 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 file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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/xhtml
    • http://www.xfa.org/schema/xfa-data/1.0/
    • 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_obj0026_000.js
1e77217b4450d6daa21c43d3be7ab69cbef6e630f4d9b6164e10c2688d2c0bec		 pdf-javascript-stream PDF /JS object 26 at offset 0xA9E 1152 bytes
polyglot_child_pdf_off000137a9.pdf
7977eb200fe67db8920cea38113a1c73e7dc22bcaa8293da9764212302ff790a		 polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x137A9 33263 bytes

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