Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9444e99b146bba6…

MALICIOUS

PDF

15.4 KB
MD5: ba544f4dc7b86f9d41197e8c8d32b21b SHA-1: 7db3d8eb941e860251822b776e63981bd9e82a35 SHA-256: b9444e99b146bba69f4f010a162fce4faea6529a5764e47ede3ae6f1c6fca944
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by an ML classifier with high confidence. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting it's designed to deliver a secondary malicious artifact. The document body contains obfuscated JavaScript-like code, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
43e4ec19dce311208ee997dbe88ae04144fc2a159cc2f7cfb961a2b4b4c77804		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 15041 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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