Malicious PDF — malware analysis report

Static analysis result for SHA-256 e90d9a1cda56a5ce…

MALICIOUS

PDF

13.2 KB First seen: 2026-05-08
MD5: 79c0323ce44fbaa4965512126180385d SHA-1: 3a9149c372084a07749b0ae8fd674e977c14d829 SHA-256: e90d9a1cda56a5cea7d8d9fd9c8b3d6fa8200e94a8329bc3ba3e0ef801247d4c
70 Risk Score

Malware Insights

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

The PDF file exhibits multiple indicators of malicious intent, including embedded files and scripts. The presence of XFA forms and embedded script payloads suggests an attempt to execute code upon opening. While the specific script logic is obfuscated, the overall structure points towards a downloader or exploit delivery mechanism. The embedded URLs, though mostly benign or unknown, are part of 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/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 12760 bytes
SHA-256: 80483925b02e7ec9838f6d7050dd59afbd1731d63299ef3f0b22fbe546eccadb

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