Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3ee154278f68bb…

MALICIOUS

PDF

15.4 KB
MD5: 22418d74301971f2044dacebf1c8dd99 SHA-1: c5955a0335af61d979aa355206a8ebcc5c24b7ef SHA-256: 4e3ee154278f68bb312ed565d8105f5538c60492b6725de80b4188ec0f8ecd4c
70 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. It contains an embedded script payload and an embedded file, suggesting it is designed to exploit a vulnerability and deliver a secondary payload. The embedded file 'embedded_file_obj0008.bin' is a primary indicator of malicious content.

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
f1b4c0a6477cb9ea7d801421a5844420a5d16510174bc456dc00c03bd4de14a0		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 15009 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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