Malicious PDF — malware analysis report

Static analysis result for SHA-256 400ad26b4968d2ad…

MALICIOUS

PDF

90.0 KB
MD5: c5dc1b930c701755149d67f602f9aedb SHA-1: 0801439864ab87656304820f83bc5c9f839f1e80 SHA-256: 400ad26b4968d2ad4225f3f7cbb56f3d3378b763679b67a68c8582c71f2ff95c
248 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains XFA (XML Forms Architecture) content, which is known to be a vector for exploits. Specifically, the 'PDF_XFA_HEAP_SPRAY' and 'CVE_2010_0188' heuristics indicate the presence of exploit code targeting a heap spray vulnerability in Adobe Reader related to LibTIFF processing within XFA forms. The embedded script payload further confirms malicious intent, likely to download and execute a second-stage payload. The ClamAV detection ID 'Pdf.Exploit.Agent-6136306-0' also corroborates the malicious nature of the file.

Heuristics 7

  • 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.
  • XFA JavaScript heap-spray exploit code critical PDF_XFA_HEAP_SPRAY
    PDF contains XFA script content with heap-spray or shellcode-like JavaScript markers such as large encoded word sequences, util.pack, large arrays, or spray variable names. This is a weaponised Adobe Reader exploit pattern, not a normal interactive form.
  • 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://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_pdf_script_0000023c.bin
779600d3e5b84c36c3671ed8c7fa0c328ba8e4801eff2aa4f6fdb39350e3b00a		 pdf-embedded-script PDF raw stream script payload at offset 0x23C 91488 bytes

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