Malicious PDF — malware analysis report

Static analysis result for SHA-256 423b4e12c8721a25…

MALICIOUS

PDF

15.4 KB
MD5: 1cc90319e99120aa23bbbce13cb94094 SHA-1: dcdb01747b4186997f591c723e92be16b9e82f93 SHA-256: 423b4e12c8721a257e895843c99d268b390f9fa050cec2831300e5fa9a2b6bf6
70 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier with high confidence. Heuristics indicate an embedded script payload and an embedded file, suggesting the document is designed to exploit a vulnerability and deliver a secondary payload. The embedded file 'embedded_file_obj0008.bin' is the primary artifact of interest.

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
cc66ebbc56426ca69d44b440b69262b99001cbd2683c35ab1e79a02bdabcc211		 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).

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