Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf5f7b025ef586a6…

MALICIOUS

PDF

13.2 KB
MD5: 9a2afcfb49462eee19a6078965cc63e6 SHA-1: b4926b326f081f4923e79a6d9672527148354112 SHA-256: cf5f7b025ef586a69b25459c20ea0a2ec2c74c18e1246ed39afa72f625b3a89d
66 Risk Score

Malware Insights

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

The PDF file contains embedded content and an embedded script payload, strongly indicating malicious intent. The ML classifier assigned a very high probability of maliciousness. The embedded file object is the primary artifact delivered by this PDF.

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
81ef2feb6384452c7959fcc5e15011d636af37603f25515f3033188e1fa634c9		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 12815 bytes

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