Malicious RTF — malware analysis report

Static analysis result for SHA-256 8c5365d6aeb63dcc…

MALICIOUS

RTF

4.45 MB Created: 2026-01-29 17:14:00 First seen: 2026-06-19
MD5: f6f8e3f1a1f00aea2a6efdfd546f781c SHA-1: c00e5cbb86a53f2ac166d9a7f3d6f51e4a24ddb8 SHA-256: 8c5365d6aeb63dcc564397a9cceb85bb0a9941af267e51282a74142e16062102
262 Risk Score

Heuristics 8

  • 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
  • Large hex data blocks in OLE object high RTF_EXCESSIVE_HEX
    RTF contains ~4535KB of hex-encoded data inside \objdata sections — may hide a payload
  • OLE object data medium RTF_OBJDATA
    RTF contains 4 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • 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 In RTF body
    • http://schemas.microsoft.com/office/word/2003/wordmlIn RTF body

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00460a10.bin rtf-objdata-decoded RTF \objdata at offset 0x460A10 2809 bytes
SHA-256: 10b503939c9b17e6ea0078cd884ac80f87db01d0a296d34cc1e037534dbfaf8c
objdata_01_off004620bc.bin rtf-objdata-decoded RTF \objdata at offset 0x4620BC 2609 bytes
SHA-256: df33fd969202e9c11e78ea6771e49e4b5dbe93055319ffa3fd1771b5c0345911
objdata_02_off004636bd.bin rtf-objdata-decoded RTF \objdata at offset 0x4636BD 2609 bytes
SHA-256: ce03a315cefc0961e24a558de29c8f9b824ff8183432f35f79efd07ce7d83d9f
objdata_03_off00464c73.bin rtf-objdata-decoded RTF \objdata at offset 0x464C73 29044 bytes
SHA-256: 09287a551626fbb376f0d40893eb8dc359d22f56c42f4ab3d75e66ec31cf5c99

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