Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dcaea5faf9da65f…

MALICIOUS

PDF

79.6 KB
MD5: dad6c8943803d1ff506a2d85e2436285 SHA-1: b6f48f82485d2197774e3841c733e184ccf2cab2 SHA-256: 6dcaea5faf9da65fc96ed0bbd1eebb1cfd4af36b473e8c21fc9b782cf98925fd
176 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded XFA form, which is leveraged by the CVE-2010-0188 exploit. This exploit targets a vulnerability in Adobe Reader's handling of XFA forms, leading to arbitrary code execution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver 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.
  • 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
d369e9a8adcd14a3c47f45d7fa9ee105446974f6d704f51aac51d238f552f33c		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 80737 bytes

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