Malicious RTF — malware analysis report

Static analysis result for SHA-256 af413b0653ad1a9d…

MALICIOUS

RTF

990.9 KB Created: 2017-08-13 10:39:00 First seen: 2017-08-27
MD5: fd0d2a891faac3b84d0d49a73c49f60c SHA-1: 7f355028c2cbbde5ff1abe3c2a17f0c9c813dcbd SHA-256: af413b0653ad1a9db624bdd754a85f0257b44a7429d058666415d6a51b5943b7
222 Risk Score

Malware Insights

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

The sample is an RTF document that exploits CVE-2017-0199, a known vulnerability in Microsoft Office that allows for remote code execution. The document contains a lure instructing the user to enable editing, which is a common tactic for malware droppers. The exploit targets the URL http://188.226.129.180/logo.doc to download a secondary payload.

Heuristics 7

  • 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.Exploit.CVE_2017_0199-6335035-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_0199-6335035-0
  • 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 1 \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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://188.226.129.180/logo.doc In RTF body
    • http://schemas.microsoft.com/office/word/2003/wordmlIn RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000ee5b6.bin rtf-objdata-decoded RTF \objdata at offset 0xEE5B6 5600 bytes
SHA-256: 16412e68124032b625f493a4fc41263ff472135415c81936c6679f903c8e5830

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