Malicious PDF — malware analysis report

Static analysis result for SHA-256 435ed6d823e1a184…

MALICIOUS

PDF

12.0 KB
MD5: 05c676724b41faecbadd13656eda2e10 SHA-1: 62540d6f13f8fe5645078402e5011c8c18cedd75 SHA-256: 435ed6d823e1a1848b96a3a4c95e2a57f6b74953de9e0878c96639cbbc871bf6
66 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded script content, flagged by heuristics as a potential payload. The ML classifier strongly indicates maliciousness. The embedded script likely attempts to exploit a vulnerability within the PDF reader to execute further malicious code, potentially leading to a second-stage download or exploit. The presence of XFA forms and embedded files are common delivery mechanisms for such attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/
    • 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
8d703b8bd4b0b990324090a09929611c2cb8d2dad8cedbbce21f19d1679bebb6
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11611 bytes