Malicious PDF — malware analysis report

Static analysis result for SHA-256 a85e15769ef9c9bf…

MALICIOUS

PDF

13.0 KB First seen: 2026-05-08
MD5: 77236e23f5630b546129ebf85189892a SHA-1: f40ec0dc31b58f5f7f5a352e9cf72cd5591947f8 SHA-256: a85e15769ef9c9bfd68ec4fd1259b8529e4e12671d69c2fef15008b94ada6a58
130 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded content and an embedded script payload, indicating an attempt to deliver a secondary malicious file. The document body contains obfuscated JavaScript that appears to be constructing a URL or command. The embedded script payload is the primary indicator of malicious intent, likely to download and execute a second-stage payload. The presence of XFA forms and embedded files are common delivery mechanisms for such attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
  • 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
    • http://ns.adobe.com/xdp/\In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0009.bin pdf-embedded-file PDF EmbeddedFile object 9 at offset 0xD5 12566 bytes
SHA-256: fa63c2b86c0f7be2ba92eee96f300596cf033a612308f61540baebfc88a933db

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