PDF static analysis report

Static analysis result for SHA-256 8245ceb55454ab98…

SUSPICIOUS

PDF

7.4 KB Created: 2012-08-04 17:40:47
MD5: df29c03f21abd7eab80fd203043aea31 SHA-1: 16f0b5f574bf364274cebc02736233c6429b2e44 SHA-256: 8245ceb55454ab9858e1fa7ea143371de9c46ab93011e0b79c4e103608949bf0
58 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF document was flagged by an ML classifier as malicious, with a high probability. Static analysis revealed embedded script content and an embedded file, indicating an attempt to exploit vulnerabilities and deliver a secondary payload. The presence of XFA forms and embedded scripts suggests a common technique for exploiting PDF reader vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • Embedded script payload in PDF stream low 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.
  • 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/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xfdf/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0011.bin
be5259bf917814f62e1550fbcd49b62f022a117e89200dcaa6f4d0aef9a4fda6		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0xB97 6910 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 long base64-like blob(s).

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