Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff8e8f44fd3f4c1a…

MALICIOUS

PDF

5.6 KB First seen: 2026-05-08
MD5: 6342a83fdc40e7402b4ec9292a5d8bb2 SHA-1: 086691fd9cc977d38fb67e52efd509ad419d4684 SHA-256: ff8e8f44fd3f4c1aac2ea86499e1a11a303b00c03d14936ed97880f0bbce915b
72 Risk Score

Malware Insights

MITRE ATT&CK
T1505.003 Server Software Component: Code Repository T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file exhibits multiple indicators of malicious intent, including an embedded script payload and an embedded file. The presence of XFA forms and embedded scripts points towards a potential exploit or downloader. The embedded file, named 'embedded_file_obj0008.bin', is likely the secondary payload. The URLs found are related to XFA schemas and Adobe, but one is confirmed benign, while the others are unknown.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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 0x78 5069 bytes
SHA-256: 7a7bff15db3fcc38a8132ada3e23cfc84c02f0ef6a63282c5b695d01ff547802
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 long base64-like blob(s).

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