Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5a101f0d041b960…

MALICIOUS

PDF

5.6 KB
MD5: d7875eb06f5b9bdf6343f3a4c478ecd8 SHA-1: c8566593e97f852ed95384aeecada3fd37bd6804 SHA-256: f5a101f0d041b960d3faaacabb14a56f47ceb8f519d418ad2c67c5a0f02d08ab
68 Risk Score

Malware Insights

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

The PDF file contains an embedded script payload and an embedded file, both flagged as malicious by heuristics. The ML classifier strongly indicates maliciousness. The embedded file 'embedded_file_obj0008.bin' is the primary artifact of interest, likely serving as the second-stage payload.

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
d0d577cefecfdee629b3f8aa40d9bb59ee127d0423d9abf2b82fb6fd921842ce		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x78 5073 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 long base64-like blob(s).

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