Malicious PDF — malware analysis report

Static analysis result for SHA-256 527dae8e4e479c35…

MALICIOUS

PDF

13.2 KB
MD5: 1042383609df15a689e12e8a0f3af713 SHA-1: 17a66c3e5218b2f6e93270a17b95f6c345656747 SHA-256: 527dae8e4e479c35f04aa59e88185a88cc4f008d2d40d1c3067cea000b43d4a4
66 Risk Score

Malware Insights

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

The PDF contains an embedded script payload and an embedded file, strongly indicating malicious intent. The ML classifier also flagged this PDF with high confidence. While the script content is obfuscated, the presence of these elements suggests an attempt to exploit a vulnerability and execute a secondary 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/xci/
    • 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
6a6b668ee16dc7b6149903eb73694153f85e5877945752e69fae03085a646225		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD5 12791 bytes

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