Malicious RTF — malware analysis report

Static analysis result for SHA-256 511e6305e4d7cf45…

MALICIOUS

RTF

51.1 KB Created: 2017-08-18 04:09:00 First seen: 2017-08-27
MD5: 28198d290e2ab614934ba0f2b03fd72e SHA-1: bac0c9ed2df2b06afbd094795aec0d48a67ae436 SHA-256: 511e6305e4d7cf450f8e70339b50fe2a48b5b2b9fc08f313dfef569b80288143
202 Risk Score

Malware Insights

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

The RTF document contains an OLE object that exploits CVE-2017-0199, indicated by the 'CVE_2017_0199_WEAPONIZED_URL' heuristic. This exploit is designed to download and execute a secondary payload from the embedded URL 'http://localhost/hta/2.hta'. The presence of OLE object data and automatic linking further supports the exploitation vector.

Heuristics 6

  • CVE-2017-0199 (OLE2Link / weaponized URL) critical CVE exact CVE_2017_0199_WEAPONIZED_URL
    RTF contains a URL Moniker OLE link to a script/HTA/template-style remote loader, matching the tighter static CVE-2017-0199 shape.
  • 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.
  • 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://localhost/hta/2.hta 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_off00002b58.bin rtf-objdata-decoded RTF \objdata at offset 0x2B58 5808 bytes
SHA-256: a0984bf4ed7b6277b61c73d1269216f020b62549f0d61fff159f2d148cfd282d

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