Malicious PDF — malware analysis report

Static analysis result for SHA-256 a65a2c493815a1d8…

MALICIOUS

PDF

111.0 KB
MD5: f4b981d1bd76b7f49945769f315eaf02 SHA-1: 5b0fb5c71f8ab3f3857f892cc90e8e25da6a1133 SHA-256: a65a2c493815a1d8e3326edf4fd1085157c855641ffef722f865ca217038c150
248 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File

The PDF file contains critical heuristic firings indicating the use of XFA JavaScript heap-spray exploit code targeting CVE-2010-0188. This suggests the document is designed to exploit a known vulnerability in Adobe Reader. The embedded script payload and XFA form further confirm the malicious intent to execute arbitrary code upon opening. The URLs extracted are related to XFA but do not appear to be directly malicious.

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_0000023b.bin
66fa08d1d2ddff82a5ac1dcc77922d51dec5c0acf88b3e879c936fa9023f2ce7		 pdf-embedded-script PDF raw stream script payload at offset 0x23B 112927 bytes

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