Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 be859b4f4576ec09…

MALICIOUS

RTF / .DOC

131.2 KB Created: 2026-01-29 07:46:00 First seen: 2026-02-03
MD5: 58f517bdc9ba8de1b69829b0dcf86113 SHA-1: 34f77c7e57f4f1798835b09c398765cc40414461 SHA-256: be859b4f4576ec09b69a2ef2d119939f7eb31de121aa01d38e1f0b2290f5a15e
202 Risk Score

Malware Insights

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

The file is an RTF document that leverages multiple critical vulnerabilities, specifically CVE-2026-21509 and CVE-2026-21514, to achieve code execution. The presence of OLE object data and embedded objects further indicates a malicious intent to exploit these weaknesses. The embedded URL http://192.168.217.250/scr2.rss is likely used to download a secondary payload.

Heuristics 6

  • 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.
  • CVE-2026-21514 — Word/OLE security bypass in RTF high CVE likely CVE_2026_21514
    RTF document contains an embedded Word package with a webSettings frame relationship to a local Windows diagnostics XML target. That matches observed CVE-2026-21514 exploitation, where crafted Word/OLE metadata bypasses Office security decisions when opened.
  • ClamAV: Win.Exploit.CVE_2026_21514-10059348-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Exploit.CVE_2026_21514-10059348-0
  • OLE object data medium RTF_OBJDATA
    RTF contains 4 \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://192.168.217.250/scr2.rss
    • http://schemas.microsoft.com/office/word/2003/wordml}}\paperw12240\paperh15840\margl1440\margr1440\margt1440\margb1440\gutter0\ltrsect

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000e20a.bin
ee106379c77ffb03d960d29e2326c88193a800b12f76846983552efcf0aaceb0		 rtf-objdata-decoded RTF \objdata at offset 0xE20A 2809 bytes
objdata_01_off0000f858.bin
6991a2bbe8648ec468a7def0a3db25d9eec28cf62484ddd779b7906961e1fc33		 rtf-objdata-decoded RTF \objdata at offset 0xF858 2609 bytes
objdata_02_off00010dfb.bin
816c4010751ef36d518599f8c6ece6367b0be6a6e5e290751759bf329dc817dc		 rtf-objdata-decoded RTF \objdata at offset 0x10DFB 2609 bytes
objdata_03_off000123b1.bin
09287a551626fbb376f0d40893eb8dc359d22f56c42f4ab3d75e66ec31cf5c99		 rtf-objdata-decoded RTF \objdata at offset 0x123B1 29044 bytes

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