Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce2bc9fb76ede42…

MALICIOUS

PDF

89.9 KB
MD5: 22f16f41b74c69bcf19a9240f18e666d SHA-1: 428924ab806b9b4d139f6954fd0e9fbae6df8004 SHA-256: bce2bc9fb76ede4297a8a9f684f66ea50963d101346872d3dfb04837b5e48722
250 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: PowerShell

The sample is a PDF file that utilizes XFA forms, which are known to be susceptible to exploits. Critical heuristics indicate the presence of an XFA heap spray and exploitation of CVE-2010-0188, a known vulnerability in Adobe Reader's LibTIFF component. This suggests the PDF is designed to deliver a malicious payload by exploiting this vulnerability when opened in a vulnerable reader. No specific family could be identified, but the exploit mechanism is clear.

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
e9290645bf3cd1e237a63de2e9bfa1923f392aea244011317a86122fc5d09518		 pdf-embedded-script PDF raw stream script payload at offset 0x23C 91388 bytes

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