Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef9ece0f333cacb5…

MALICIOUS

PDF

13.1 KB First seen: 2026-05-08
MD5: 7fc0642e89676222d8b88ef785b72f92 SHA-1: 7fa72d9d1a487c3a6b61d2ce1f6e59e945c06210 SHA-256: ef9ece0f333cacb5fdb3f2f6e7d6a331eea455442d79d8286369907565354e32
70 Risk Score

Malware Insights

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

The PDF file exhibits multiple indicators of malicious intent, including embedded files and scripts. The presence of XFA forms and embedded scripts suggests an attempt to execute code or deliver a secondary payload. The document body contains obfuscated JavaScript, which likely attempts to download and execute a malicious payload. The embedded file artifact further supports the delivery of malicious content.

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 12687 bytes
SHA-256: bb948b9b4e52afa23cddae4bef0a8f4706db098072570dabe8d9b76056dfd320

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