Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade0b3995c67ef6e…

MALICIOUS

PDF

15.8 KB
MD5: 98f9656e57429dd9271af5f26dce8712 SHA-1: db8f1183ee6ea4fc60f7aca089e375ff7fd1fa83 SHA-256: ade0b3995c67ef6e73fddfb6c761b4cc5967f134c4158770ddff9eb0f06d271f
66 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier with high confidence. It contains an embedded script payload, indicating it is designed to execute malicious code upon opening. The presence of XFA forms and embedded files further supports its malicious nature. The embedded script is likely responsible for downloading and executing a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9799

Heuristics 4

  • 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
  • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_000002dc.bin
5234087ba75e2641f89926108e04afbd99eb1fe1cd7a9b160c8b30c9b09ff5b5
pdf-embedded-script PDF decompressed stream script payload at offset 0x2DC 14230 bytes