Malicious PDF — malware analysis report

Static analysis result for SHA-256 944e1e2f61100de9…

MALICIOUS

PDF

6.2 KB
MD5: 0c033cb40c61a8757b31f806f3030d64 SHA-1: 1ec048543c2ee42469267b0abf6c377dfb4edfb2 SHA-256: 944e1e2f61100de9411e85e7f35c7cc6519a68cfb9257b38388fde9a89f41a13
66 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The eval() call within the JavaScript stream is highly suspicious and suggests the execution of obfuscated or dynamically generated code. While no specific URLs were flagged as malicious, the presence of obfuscated JavaScript within a PDF is a strong indicator of malicious intent, likely to download and execute a secondary payload. The extracted artifact objstm_0023_00.bin is also noted as suspicious.

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. (matched inside decoded stream)
  • 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. (matched inside decoded stream)
  • String.fromCharCode low PDF_FROMCHARCODE
    String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
  • 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://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objstm_0023_00.bin
ee45f59fc57797fd6f5133c35014850fffd974e28e697d06531aa316e283ee5a		 pdf-objstm-decoded PDF /ObjStm 23 0 obj (inflated) 660 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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