Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5cf07c915240da9…

MALICIOUS

PDF

99.7 KB First seen: 2026-05-08
MD5: 78bb2e770d2b0e03852ebd7c79394d57 SHA-1: bf309144c1c4f014a022ec5b784d5ae5f9755a2f SHA-256: d5cf07c915240da9c03cec01927cfc204ada3518f93d8c043810d53c30882787
70 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a malicious document, including an embedded script payload and an embedded file. The presence of XFA forms and embedded content indicates a potential for exploitation or delivery of further malicious stages. The embedded URLs, while mostly benign or unknown, are associated with the document's structure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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 script payload in PDF stream info 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 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/ In PDF document text
    • http://www.xfa.org/schema/xfa-template/2.5/In PDF document text
    • http://www.xfa.org/schema/xfa-data/1.0/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101394 bytes
SHA-256: 86fb71927bcdc20914cf102f7356d30b8593f016045690c1f8f78251e69b158d

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