Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd71f8747c42c7a1…

MALICIOUS

PDF

13.4 KB First seen: 2026-05-08
MD5: 70b9c6dc8ac778730671b0267e5790ac SHA-1: 9fa3ac0e78835feca196c2965bde84f5edba0c7c SHA-256: fd71f8747c42c7a126fec239293e739f5a4eab0fbb50e201897efa0079412877
70 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of potentially malicious content, including embedded files and XFA forms. The presence of an embedded script payload further indicates a potential for malicious execution. While the specific intent is not fully clear due to the nature of the extracted content, these elements collectively suggest an attempt to deliver a secondary payload or exploit a vulnerability. The embedded URLs are not directly indicative of malicious activity but are noted as 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/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 12951 bytes
SHA-256: c0dd58abf84a529c8555fbd321f9536122663741ceba7d7464da049afc576a90

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