Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c762a1df439dc1…

MALICIOUS

PDF

81.8 KB
MD5: 91f3749797a54b7188e03bc7a7e41d99 SHA-1: 7c9f6bf2e02e8bec71b10502e6a9277fb584d6a7 SHA-256: 79c762a1df439dc110cdee38b9473deeac5c9239c890e08ef54fac00d8fc52c1
176 Risk Score

Malware Insights

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

This PDF file contains an embedded exploit targeting CVE-2010-0188 in Adobe Reader's LibTIFF component. The exploit is designed to execute arbitrary code, which is a common method for delivering secondary payloads. The ML classifier and ClamAV detection strongly indicate malicious intent, and the embedded file further supports this.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-93 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-93
  • 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
dc28cb3cada26346bebd86c2480080075a605b61d539489e0f1dac2afb3ab3f8		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 83499 bytes

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