Malicious PDF — malware analysis report

Static analysis result for SHA-256 f400ea87aa9226b5…

MALICIOUS

PDF

7.6 KB
MD5: dcead0a630cdff447837883b4422221a SHA-1: 3ccb4fe1e660e639cd940761d77832f06867cd9f SHA-256: f400ea87aa9226b5e69e5fc7d97b80744c60fe964746bd884f069cf1f28aa862
88 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. A high-severity PDF_EVAL heuristic indicates the use of eval() on obfuscated JavaScript, suggesting an attempt to hide malicious code execution. The ML classifier strongly supports a malicious verdict. The primary attack vector appears to be the execution of this obfuscated script, likely to download and execute a secondary payload, though the exact payload and destination are not discernible from the provided evidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9520

Heuristics 5

  • 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)
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00000328.js
0478e1a2e7407f183bd63ce94eecf4c2a4352fa0cf399a0816d99abb406799ad		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x328 2329 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
objstm_0024_00.bin
ae0eba80b577d0956652282576eba71282c091146e96224e5cdbedfd9c85f56e		 pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 331 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.