Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd5ea28ed1c2c8b…

MALICIOUS

PDF

99.7 KB
MD5: 5f4cd25f7bfb8d57a2da41d023ae7598 SHA-1: 015306cfc9a0d37db061b9b1b5b8ee67e8ba9cba SHA-256: 7bd5ea28ed1c2c8b6c72001ea14cea645ae50e2305fc433f104f007c4eb8b5ed
196 Risk Score

Malware Insights

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

The sample is a PDF file that exploits CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms and LibTIFF parsing. The heuristic firings indicate the presence of an embedded script payload within an XFA form, which is characteristic of exploit-laden PDFs. ClamAV also detected this file as Pdf.Malware.Agent-7653365-0. The embedded script likely downloads and executes a second-stage payload.

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.
  • ClamAV: Pdf.Malware.Agent-7653365-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Malware.Agent-7653365-0
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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_file_obj0008.bin
2f2a510075d1042c79c8c2e7dc9dea0f255c1f158dbc7b4e19fc9aa08234ed47		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101365 bytes

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