Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4a8179b4a5e14b…

MALICIOUS

PDF

13.1 KB First seen: 2026-05-08
MD5: 67cc9e2c1e7dd3a4629f5dd7b6fa7daa SHA-1: d4ded2669160330b3fdccd83c72ee39cdcad67aa SHA-256: fb4a8179b4a5e14bb7b951cdc75ac5a5535e03ba59c4c6f4ae98f46a7b5d452b
70 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains an embedded script payload, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. The document body contains obfuscated JavaScript-like code that appears to be attempting to decode and execute further content. This suggests the document is designed to exploit a vulnerability to run malicious code, likely leading to a second-stage download or execution.

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/xci/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 0xD5 12693 bytes
SHA-256: 19ac7c821bf179ad26cac6903c3507173e18ab4b64658aa3436805b2661c97cd

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