Malicious PDF — malware analysis report

Static analysis result for SHA-256 d192807889efb9c0…

MALICIOUS

PDF

3.7 KB
MD5: 3959e7dd971966ae76cf2557e8d8f6c4 SHA-1: 1a2f3e74fcdc4be86fe690e3452b7a189b8b9025 SHA-256: d192807889efb9c021f1002dfa2c0afa6c10932f3a9b3aceae43e19d2714df57
108 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains embedded JavaScript, indicated by the PDF_EVAL and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. The ML classifier strongly suggests maliciousness. The embedded script is likely designed to download and execute a second-stage payload, as suggested by the 'Script obfuscation indicators' finding for the extracted artifact. The document body contains a partial JavaScript eval call, further supporting this. No specific family could be identified.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD7 67 bytes
embedded_file_obj0009.bin
e2e0f6c5cb2e0b2697da89386bfc3718eedaf1b6a2b1d24dd1176d27117bf77a		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x162 781 bytes
embedded_file_obj0010.bin
1f75200dbc23b9db3b25cd182259bf51881accd21d80781883660f585a500921		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x4BA 97 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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