Malicious PDF — malware analysis report

Static analysis result for SHA-256 40295ee425b014da…

MALICIOUS

PDF

102.2 KB
MD5: cf9eccd53d665de7d0427a03ef72c3df SHA-1: fbf7668483c68b220e4a14aabf8333bbc921703b SHA-256: 40295ee425b014da5767ab80e938f635b08246a15f28767d0d433ff565d0f3e8
188 Risk Score

Malware Insights

MITRE ATT&CK
T1204 User Execution

The sample is a PDF file that leverages an XFA form to exploit the CVE-2010-0188 vulnerability in Adobe Reader. This exploit allows for the execution of embedded scripts, which are likely used to download and execute a secondary payload. The presence of an embedded script payload and the specific XFA exploit heuristic strongly indicate malicious intent.

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
7ffe454d83854ebdc4790b772b5c7ef696c538fb050c0f8165679818bdf8343a		 pdf-embedded-script PDF raw stream script payload at offset 0x346 103938 bytes

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