Malicious PDF — malware analysis report

Static analysis result for SHA-256 4431dbfa0acfc73d…

MALICIOUS

PDF

86.4 KB
MD5: fff227dcad8caa195a291199c1257fcd SHA-1: 4d661d4f59dd1df74d4992af51bbd856b6ea8511 SHA-256: 4431dbfa0acfc73d8f8884929139a077704e5ccee4bcb55fe9a368c0283f1601
156 Risk Score

Malware Insights

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

The sample is a PDF file that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms. The heuristic 'CVE_2010_0188' indicates the exploitation of this specific vulnerability. The PDF also contains an embedded file and an embedded script payload, suggesting it's designed to download and execute a secondary stage. The ClamAV detection 'Pdf.Exploit.Dropped-78' further confirms its malicious nature.

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.
  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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
bc1c484f0f05f46f0bb10dd87af6993af91bb911272fd514afaa0cc9099b47c8		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 87742 bytes

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