Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 f0d443055143cbd6…

MALICIOUS

RTF / .DOC

101.2 KB Created: 2026-01-27 23:50:00 First seen: 2026-02-03
MD5: 828ff72e8d3dffcc232e6ae2ff100f45 SHA-1: 01a3230a0b7987e2ac597e33eaec256a40448484 SHA-256: f0d443055143cbd6bce8ef96b52d430e2db321b37b8b93a2a9d0354651702790
222 Risk Score

Malware Insights

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

The RTF document contains embedded OLE objects and triggers critical heuristics for CVE-2017-8759 and CVE-2026-21509, indicating exploitation of vulnerabilities in MSXML SAX OLE activation and Shell.Explorer.1 CLSID. This suggests the file is designed to execute arbitrary code upon opening, likely to download and run a secondary payload. No scripts were extracted, and the only URL found was benign.

Heuristics 6

  • CVE-2017-8759 — MSXML SAX OLE activation critical CVE likely CVE_2017_8759
    RTF contains a hex-encoded OLE1 object for Msxml2.SAXXMLReader.6.0 followed by an embedded OLE compound document, and the document requests OLE activation. This matches the RTF staging shape used for CVE-2017-8759 SOAP/WSDL parser code injection.
  • CVE-2026-21509 — Shell.Explorer.1 CLSID in RTF critical CVE related CVE_2026_21509
    RTF document contains the Shell.Explorer.1 CLSID {EAB22AC3-30C1-11CF-A7EB-0000C05BAE0B} associated with CVE-2026-21509 (OLE/COM Killbit / Protected View bypass). Actively exploited in the wild.
  • ClamAV: Rtf.Exploit.CVE_2026_21509-10059214-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Exploit.CVE_2026_21509-10059214-0
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • 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://schemas.microsoft.com/office/word/2003/wordml}}\paperw11906\paperh16838\margl1440\margr1440\margt1440\margb1440\gutter0\ltrsect

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00004bd7.bin
f8570a2b043259b07f2bfd220b35bd9dfad5bdb1f26da61b0cd222fc904733d7		 rtf-objdata-decoded RTF \objdata at offset 0x4BD7 3121 bytes

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