Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d76b3c3a833fb2f…

MALICIOUS

PDF

51.1 KB
MD5: d80ddc6e31eb65fa0e96719cbdcd61c5 SHA-1: f5eab7429412bad99b6b8591ca491d040d26bf08 SHA-256: 5d76b3c3a833fb2fc9d4888489488a1bcba5e0aa71cedff511bb22b46677db0e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file is flagged as malicious by multiple engines, including ClamAV and a machine learning classifier. It contains an embedded exploit targeting CVE-2010-0188, a known vulnerability in Adobe Reader's handling of XFA forms. The exploit is likely used to download and execute a secondary payload, although no specific URLs for this payload were found in the extracted evidence. The benign URLs present are related to XFA schema definitions and do not indicate malicious activity.

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.
  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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 low 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/
    • 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
8aabb78d38e8d8eb79e80b4b7b5f7cd90247b8ed85184ebb770eea2d71d1db55		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 51561 bytes

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