Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca3aded4e9a665f8…

MALICIOUS

PDF

16.0 KB
MD5: a2ba05bd96b656111e3b867a358c0590 SHA-1: f0607fbdd729e345504de3c43775cdadd3662f00 SHA-256: ca3aded4e9a665f8a3315e879249342f3424a44e3dd5e05029fcbc7699445059
66 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier with high confidence. It contains an embedded file and an embedded script payload, indicating it is likely designed to deliver a secondary malicious component. The presence of XFA form elements and embedded URLs, while not inherently malicious, are common vectors in PDF-based 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/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.4/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0020.bin
32018c596901aca89ebe0deac64694abf555fc5860cd0b5fb824e45d62e45f7a		 pdf-embedded-file PDF EmbeddedFile object 20 at offset 0x49 14983 bytes

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