Malicious PDF — malware analysis report

Static analysis result for SHA-256 9056ba79bac5d3d0…

MALICIOUS

PDF

13.3 KB
MD5: 0453ec49b2d0ff32c7910911200e714a SHA-1: 4755b7bc015f8d4ab8c77f43a817f1ae1f04a5d5 SHA-256: 9056ba79bac5d3d012b60b3f1cb56abee49a2ef69225edf15d1818c6da334302
66 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious with high confidence. It contains an embedded script payload and an embedded file, indicating an attempt to deliver a secondary malicious artifact. The presence of XFA forms and embedded files suggests a potential exploit targeting PDF vulnerabilities.

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
1de00c69bb623a81a92b076bf7f246c60f765b648b4862139f065129d59fefcb		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD5 12814 bytes

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