Malicious PDF — malware analysis report

Static analysis result for SHA-256 b45988aa87d08503…

MALICIOUS

PDF

13.5 KB
MD5: 3742478d336ca47e452bbca24b44e7d8 SHA-1: 58f660d11bfde69129f165dca4b907492f364755 SHA-256: b45988aa87d0850394d7091c6c40e8b8e69c2c2b11069fba45695bf38a559dea
66 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1566.001 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file was flagged as malicious by an ML classifier with high confidence. It contains embedded content and scripts, suggesting it's designed to deliver a secondary payload or exploit a vulnerability. The presence of embedded files and scripts points towards a delivery mechanism for malware. While specific script actions are not detailed, the overall structure indicates a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Embedded script payload in PDF stream medium 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 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 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/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
fa1851ced50acbb2953e7774515bec1082420c1564e5dba11f84792a24205d8a		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 13095 bytes

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