Malicious RTF — malware analysis report

Static analysis result for SHA-256 9a976f1a4baf4fb9…

MALICIOUS

RTF

1.36 MB Created: 2026-01-29 17:18:00 First seen: 2026-06-24
MD5: 070e4122b98130cf92a9511b1bbc15a9 SHA-1: 8e9a3b0235aa560e8af8c0ba6b9c979cd9612cde SHA-256: 9a976f1a4baf4fb982a79210f9e66492830aed8072068761453140f269edfe0f
262 Risk Score

Malware Insights

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

The RTF file contains embedded OLE objects and exhibits characteristics of known exploits, specifically CVE-2026-21509 and CVE-2026-21514, which are designed to bypass security mechanisms in Microsoft Office. The presence of a suspicious URL, http://192.168.217.250/scr2.rss, suggests a potential download or command-and-control channel. The document body's content about weapons smuggling appears to be a lure to disguise the malicious intent.

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 ~1299KB 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_off0014a62d.bin rtf-objdata-decoded RTF \objdata at offset 0x14A62D 2809 bytes
SHA-256: 91a51e305f27b9dfd021ab14f0e9c217c44b065df124469a06494b3e616e5973
objdata_01_off0014bcd9.bin rtf-objdata-decoded RTF \objdata at offset 0x14BCD9 2609 bytes
SHA-256: 1e0329973ff8029c55e784e4bf1c73aead56c2e4f1db6c45c2bc71b052735dd3
objdata_02_off0014d2da.bin rtf-objdata-decoded RTF \objdata at offset 0x14D2DA 2609 bytes
SHA-256: bf9ff6efbf43eea6058cb4cbb82e9b3366708bdad294516eb9630b483229d275
objdata_03_off0014e890.bin rtf-objdata-decoded RTF \objdata at offset 0x14E890 29044 bytes
SHA-256: 09287a551626fbb376f0d40893eb8dc359d22f56c42f4ab3d75e66ec31cf5c99

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