Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f79c2f6268e90b…

MALICIOUS

PDF

94.5 KB
MD5: 204d39607b254d6462037f0e16593bc4 SHA-1: 3501ea4f6fa53a8e878d1ea6fbc4aeb8e262b19a SHA-256: 70f79c2f6268e90bb1d197dfc538e9c606e9a5540145c6d0305df547d31827b6
176 Risk Score

Malware Insights

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

The file is a PDF that triggers a critical heuristic for CVE-2010-0188, an Adobe Reader exploit targeting XFA forms. This exploit is designed to achieve arbitrary code execution. The presence of embedded script payloads and the ML classifier's high confidence further support its malicious nature. The benign URLs do not detract from the exploit's potential.

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.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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
2ffb5b5be946392b56f7674725e3937f3bbb1e2e90af0b5ef73d9a23773e3d98		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 96049 bytes

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