Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6a81ee72dd6ae33…

MALICIOUS

PDF

99.6 KB
MD5: 71239cfeeb235e7bd7d2f059f2c7c645 SHA-1: 2f71f9c05bd02fffebb31a0b9fe7e91b4302fce9 SHA-256: d6a81ee72dd6ae330b5a6013a5819e7a5b5668412d657675cd606e839ac54586
136 Risk Score

Malware Insights

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

The sample is a PDF file that exploits CVE-2010-0188, a vulnerability in Adobe Reader's LibTIFF component. The PDF contains XFA forms and embedded scripts, indicating an attempt to leverage these features for malicious code execution. The embedded script payload suggests the PDF is designed to download and execute a second-stage payload, though the exact nature of the payload is not discernible from the provided data. The presence of XFA and embedded scripts strongly points towards an exploit delivery mechanism.

Heuristics 6

  • 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.
  • 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
d4896933d5d92d22d57d1486eb482afecbe45f363a18b905695eec8c9c2127be		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101289 bytes

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