Malicious RTF — malware analysis report

Static analysis result for SHA-256 612d7f8f9cd3bb3c…

MALICIOUS

RTF

186.1 KB Created: 2017-10-24 14:23:00 First seen: 2017-10-28
MD5: 5aab5b8905edeb6713840fa81ac6688f SHA-1: 0419270a21463dd9ba7730191d3013d13cbf7c88 SHA-256: 612d7f8f9cd3bb3cdcd811abb9b8356dfab756b22028e1f812eae3f3651cce01
262 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains embedded OLE objects and triggers critical heuristics for CVE-2017-0199 and CVE-2017-8759, indicating exploitation of vulnerabilities related to remote URL monikers and SOAP. The embedded URL http://chilibi.com/wpincludes/text/t.php?thread=0&t=h is likely used to download and execute a secondary payload, consistent with downloader malware.

Heuristics 7

  • SOAP Moniker — CVE-2017-8759 (SOAP WSDL RCE) critical CVE related CVE_2017_8759
    RTF \objdata decodes to OLE data containing the SOAP Moniker — CVE-2017-8759 (SOAP WSDL RCE) CLSID — the vulnerable control/moniker is embedded directly in the document's object stream, the delivery shape of this exploit. RTF objects auto-render when Word opens the file.
  • CVE-2017-0199 (OLE2Link / remote URL Moniker) critical CVE likely CVE_2017_0199
    RTF contains a URL Moniker OLE link whose decoded target is remote. Office can fetch and process the response through the CVE-2017-0199 OLE2Link attack path, but the server-side content type is not proven statically.
  • ClamAV: Rtf.Downloader.CVE_2017-6336326-3 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Downloader.CVE_2017-6336326-3
  • Automatically linked OLE object high RTF_OBJAUTLINK
    RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
  • OLE object data medium RTF_OBJDATA
    RTF contains 2 \objdata section(s) — embedded OLE objects
  • OlePres presentation stream in RTF OLE object medium RTF_OLEPRES_STREAM
    RTF contains an embedded OLE object with an OlePres presentation stream. OlePres is an OLE presentation marker and is not enough on its own to identify CVE-2025-21298.
  • 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://chilibi.com/wpincludes/text/t.php?stats=send&thread=0 In RTF body
    • http://chilibi.com/wpincludes/text/t.php?thread=0&t=hIn RTF body
    • http://schemas.microsoft.com/office/word/2003/wordmlIn RTF body

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00002a3d.bin rtf-objdata-decoded RTF \objdata at offset 0x2A3D 4666 bytes
SHA-256: ab6088229a16349f71a04784beebe96e4e5e37ab18433a292671c8b36710d713
objdata_01_off00005262.bin rtf-objdata-decoded RTF \objdata at offset 0x5262 4372 bytes
SHA-256: ac7630cb8c5439907ecd2243425c0423df0e20c0cb99d8a935341b333aa31883

Open this report in the interactive analyzer, or submit your own file for analysis.