Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 5a17cfaea0cc3a82…

MALICIOUS

RTF / .DOC

4.45 MB Created: 2026-01-29 17:14:00 First seen: 2026-02-02
MD5: 4727582023cd8071a6f388ea3ba2feaa SHA-1: d788d85335e20bb1f173d4d0494629d36083dddc SHA-256: 5a17cfaea0cc3a82242fdd11b53140c0b56256d769b07c33757d61e0a0a6ec02
322 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

The RTF document contains multiple OLE objects with excessive hex data, indicating a hidden payload. Critical heuristics identify exploitation of CVE-2017-8759 and CVE-2026-21509, and a ClamAV detection confirms this is a known exploit. The embedded URL http://192.168.217.250/scr2.rss is likely used to download and execute a second-stage payload, as suggested by the exploit techniques.

Heuristics 9

  • 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.
  • 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

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

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