Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd7fa383a68e99e1…

MALICIOUS

PDF

46.7 KB Created: 2010-02-09 11:19:09 +01:00 Authoring application: Acrobat PDFMaker 8.1 für Excel (via Acrobat Distiller 8.1.0 (Windows))
MD5: 8f3455cee6b4b5652be6dfc8c224450c SHA-1: 262363c49bbebc83738c47652abb001e59fc19b4 SHA-256: bd7fa383a68e99e1047637935c2ea2590ea4495791443a1a2b762297229f735d
98 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and PDF_UNESCAPE. The JavaScript stream, named 'javascript_obj0018_000.js', is likely responsible for executing malicious code. The presence of eval() and unescape() calls suggests obfuscation and dynamic code execution, typical of PDF exploits aiming to download and run a second-stage payload. The document body content appears to be unrelated tabular data, suggesting the exploit is not directly tied to the visible content.

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/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdfx/1.3/
    • http://www.iec.ch

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0018_000.js
d51286484dc4aa68744349a6231c4ada0dd44e05be5fa63632930ff38e3e6ad3		 pdf-javascript-stream PDF /JS object 18 at offset 0x11DF 1660 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 5 eval/decoder/string-building token(s).
icc_00_off00007db4.icc
00c36ad25cc79152e364edf8e9d58e9fd2807e6188c07a8de84826e22aab9a92		 pdf-icc-profile PDF ICC profile at offset 0x7DB4 3144 bytes

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