Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfb65fffcb241ac6…

MALICIOUS

PDF

47.3 KB
MD5: c610c51a4fcd66614e6aa980363045b7 SHA-1: 03b00e7aaef7f98276d9e3cf5777ec8c0eb501d9 SHA-256: dfb65fffcb241ac6c2b4da104cb24a21499a704e7440422d1faee98d96d99113
66 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

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 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 0.9943

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_000002d8.bin
8c54dc28ce15a750b21a9f52ac5c59ba9cc16ac05feb71e29b3746a54e46078a		 pdf-embedded-script PDF decompressed stream script payload at offset 0x2D8 44403 bytes

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