Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c60d2f09e808cb2…

MALICIOUS

PDF

10.0 KB Created: 2011-01-28 17:10:49 +02:00 Authoring application: Acrobat PDFMaker 7.0.7 for Word (via Acrobat Distiller 7.0.5 (Windows))
MD5: 708255b378d9afa3216257327bcae062 SHA-1: 2d247c940d77b185a6cb46efba3c089664adf077 SHA-256: 2c60d2f09e808cb2842f37111ef621db66306bafc536d7b97f13c3a924381d7f
66 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

This PDF document contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The high-severity PDF_EVAL firing points to an eval() call within the JavaScript, which is commonly used to deobfuscate and execute malicious code. The extracted artifact 'javascript_obj0017_004.js' also suggests script obfuscation. The primary intent appears to be downloading and executing a second-stage payload, though the exact mechanism is obscured by the eval() call.

Heuristics 6

  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (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.
  • Additional-actions dictionary low PDF_AA
    PDF defines /AA (Additional Actions) that references an executable action (JS/JavaScript/Launch/SubmitForm) — can auto-trigger on document or widget events. Form-field calc/format/validate/keystroke handlers in legitimate interactive forms commonly fire this, so it is reported as a low-weight signal; weaponised auto-execution is flagged by stronger rules (PDF_OPENACTION, encrypted-with-JS, etc.)
  • 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/pdf/1.3/
    • http://ns.adobe.com/pdfx/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/photoshop/1.0/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0023_003.js
8d3d52558fbb283404103f3dbb921869b261bc349343a86c4ecc9c251410c861		 pdf-javascript-stream PDF /JS object 23 at offset 0x562 33 bytes
javascript_obj0017_004.js
86db625b4c7cad24a9aa4a6b305c8a346269cdab8ca4c3f73415be8c0ce4460c		 pdf-javascript-stream PDF /JS object 17 at offset 0x1256 493 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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