Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69358a7e423cce3…

MALICIOUS

PDF

12.4 KB Created: 2010-03-10 13:48:00 -07:00 Authoring application: Acrobat PDFMaker 9.1 for Word (via Adobe PDF Library 9.0)
MD5: 920d3931030753dc537cf7f6212103e1 SHA-1: 845aea3ccfe55f9d7ed8e34f09635c047f9198af SHA-256: b69358a7e423cce320a6659d98062168e7822b6e98760d0eaafcc730b6a5ab97
98 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream includes calls to eval() and unescape(), suggesting obfuscation and dynamic code execution. The primary function of this script appears to be downloading and executing a second-stage payload, as evidenced by the suspicious extracted artifact 'javascript_obj0039_001.js'. The document body content is truncated and does not provide further context on the lure.

Heuristics 6

  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
  • 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.
  • 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/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/pdfx/1.3/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0039_001.js
f5f8dc632db65e2175ec6509d507f09e96449c138d4d9e5b4f696531d975f7e6		 pdf-javascript-stream PDF /JS object 39 at offset 0x20E6 12201 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 eval/decoder/string-building token(s).
objstm_0054_00.bin
ae3e17da3293644f47707bd720433402351ef93104e9326509c2b78a8e071f8a		 pdf-objstm-decoded PDF /ObjStm 54 0 obj (inflated) 276 bytes
icc_00_off00001dea.icc
653b586c4707574ffcd648ba35494daed2c76ceafcf4c07d315ed961b1dc347f		 pdf-icc-profile PDF ICC profile at offset 0x1DEA 408 bytes

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