Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7708acead4f8d7a…

MALICIOUS

PDF

35.5 KB First seen: 2026-05-08
MD5: 7225c0868636a309f6fce7989759071d SHA-1: 4e57872d3fcb98667223bc1703c6c3c3cf170855 SHA-256: c7708acead4f8d7a9486470062ff7d50341833b44db84f3c703efc095e4e8627
70 Risk Score

Malware Insights

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

The PDF file contains embedded content and an embedded script payload, indicating an attempt to deliver malicious content. The presence of XFA forms and embedded files suggests a complex delivery mechanism. While the specific payload is not immediately clear from the static analysis, the heuristics point towards an exploit attempt within the PDF structure. No document body text was available for further analysis.

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 35582 bytes
SHA-256: 8bb05a1d08b799ddfee8897d8c9d3b42d034f9f74195452e94143f538222bf95

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