Malicious PDF — malware analysis report

Static analysis result for SHA-256 c33a159c91f558e0…

MALICIOUS

PDF

97.1 KB
MD5: ba5ddc8e8c30eaf611c78ba85f88968a SHA-1: c962e843da67e4f9ecc6093164208a260e500189 SHA-256: c33a159c91f558e0aee8328f37bc89b61208b291e1b9e37b156d7ef03c15b2f2
118 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious PDF T1566.002 Phishing: Spearphishing Attachment

The PDF was flagged by multiple high-confidence heuristics, including ClamAV detection as 'Pdf.Exploit.Agent-6136306-0' and an ML classifier with a score of 0.999992. The presence of an XFA form and an embedded script payload indicates an attempt to exploit vulnerabilities or execute malicious code. The embedded script is likely responsible for delivering the secondary payload, although its exact function cannot be determined due to its size and potential obfuscation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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_pdf_script_0000026c.bin
cf723613f1f2123fd2d6f06e57b9d4b4f298c01270a37183f4f548b04a11c7d0
pdf-embedded-script PDF raw stream script payload at offset 0x26C 98659 bytes