Malicious PDF — malware analysis report

Static analysis result for SHA-256 330706183d12b117…

MALICIOUS

PDF

13.1 KB
MD5: 377ded7cb8cebb4fdb43bd765113761d SHA-1: 57d8252b77755c2ecab5b6e1b7eef3cfb758c6e2 SHA-256: 330706183d12b117719dc0c60641193c600a54eb68acaa6bca4b6df9bec7ec10
66 Risk Score

Malware Insights

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

The PDF contains an embedded script payload and an embedded file, strongly indicating malicious intent. The ML classifier also flagged this PDF with high confidence. The embedded script appears to be obfuscated JavaScript, likely intended to download and execute a second-stage payload. The presence of XFA form elements and embedded files are common delivery mechanisms for PDF-based exploits.

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/xci/
    • 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
9f7370de6ca15a113d28111086424f3fb3a455eb9da3bb63940a4b410e4ea137		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD5 12672 bytes

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