Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d333a6fb9bd715c…

MALICIOUS

PDF

111.1 KB
MD5: f1ad97ad5febe935dead14046278e86a SHA-1: 63e6fe7d94639ddf1e757eb6eaf086142388eace SHA-256: 3d333a6fb9bd715cafde0d499b303e6be7f3df580131e63787b5c9ee3359cd14
250 Risk Score

Malware Insights

The file is a PDF document that utilizes XFA forms and embedded JavaScript to trigger a heap spray exploit. This exploit targets CVE-2010-0188, a known vulnerability in Adobe Reader's handling of LibTIFF XFA images. The embedded script is designed to download and execute a second-stage payload, indicated by the critical heuristic firings for PDF_XFA_HEAP_SPRAY and CVE_2010_0188. The embedded URLs are related to XFA specifications but are not 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
82a55607a81dd2298c8836af16f34de646d4da3469a94b805e3b006b3fc69a0f		 pdf-embedded-script PDF raw stream script payload at offset 0x23B 113047 bytes

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