Malicious PDF — malware analysis report

Static analysis result for SHA-256 2523b7784022e862…

MALICIOUS

PDF

13.0 KB First seen: 2026-05-08
MD5: 625122ef08c304c5caf2d6c94dfbbeae SHA-1: 66216d17c42781652d8db6a03f038d6579d3c790 SHA-256: 2523b7784022e862c84605d88f4bef545662924d3a751270cbb6faa444bf4042
130 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution

The PDF file contains embedded content and an embedded script payload, indicating an attempt to exploit vulnerabilities. The presence of XFA forms and embedded files suggests a complex delivery mechanism. The script itself appears to be obfuscated, making it difficult to determine its exact function, but it is likely designed to download and execute a second-stage payload.

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 12558 bytes
SHA-256: 01ace930a1bd2b6d79b2f421b43621e0067ece608913d7d5ee9c71c5f4c05387

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