Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef6bed2ed7b75d45…

MALICIOUS

PDF

63.1 KB
MD5: f85e00752b8b37493593b989da9e8b25 SHA-1: 1831667daaae4687b25c19487ba3f38f720e8012 SHA-256: ef6bed2ed7b75d453a4e017719b9c0ff48fe4df75de5da6c39c2c23355bf8625
196 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.001 PowerShell

This PDF file contains an embedded script payload and is detected as malicious by ClamAV. The critical heuristic firing indicates exploitation of CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms. This suggests the file is designed to exploit this vulnerability to execute arbitrary code upon opening.

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.Exploit.Dropped-93 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-93
  • 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
e8a25952cb95da3bc5a9786e4de6358352bb7f32915a541ca01c2cb2c9c379ad		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 63842 bytes

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