Malicious PDF — malware analysis report

Static analysis result for SHA-256 81e7b873187caf8e…

MALICIOUS

PDF

102.3 KB
MD5: 1ebe24d3ad121130abedda168cb20f14 SHA-1: a7eebe981f893ff7927b348bed67c0e5aebf6148 SHA-256: 81e7b873187caf8e341e6dc93c3764100c878cff9a66e3acfe4ec49baec0c29c
188 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF file exploits the CVE-2010-0188 vulnerability in Adobe Reader, leveraging an XFA form with an embedded script payload. The script is designed to download and execute a second-stage payload, indicated by the critical heuristic firings and ClamAV detection. The embedded URL, while not directly malicious in reputation, is part of the exploit infrastructure.

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.
  • XFA form contains executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose dataset contains a <script> or <xfa:script> block — XFA scripting has been the exploit primitive for several Adobe Reader RCEs (CVE-2010-0188 family, CVE-2018-4901, and others). Plain XFA without scripts is far less risky.
  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • Embedded script payload in PDF stream medium 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000346.bin
c2dddd970da7e0a3b0b845af4ab078dc54329e240abac3fa6ce124b6f5b4cfe4		 pdf-embedded-script PDF raw stream script payload at offset 0x346 104021 bytes

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