Malicious PDF — malware analysis report

Static analysis result for SHA-256 90074e1a6c5954c2…

MALICIOUS

PDF

78.7 KB
MD5: 09a1821b5ece4cc65a0e31f66f099880 SHA-1: 9d6cb0d569f3d7b0466bfd655fa88f36f4b62382 SHA-256: 90074e1a6c5954c2cc2e920d547926fd883d9b684c9bd7c104cc2da2e5648127
66 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

This PDF file 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 form elements and embedded files further suggests a complex attack vector. The embedded script likely attempts to download and execute a second-stage payload.

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
3cd0c3c1501291fd887c97c473b1b69d6ca40012fcfa58f8cced4226a57473f0		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 79868 bytes

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