RTF / .DOC malware analysis — malicious · 228264e8f57dc120

MALICIOUS

RTF / .DOC

212.8 KB

MD5: 8b40f760a193a3c91ab4a0a2b425ad18 SHA-1: 3c171a4d843deec19055254c62948f766351eb3f SHA-256: 228264e8f57dc120e866db9789ed5cf7456a486024dcd6d83a60c0b02cc11158

160 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1566 Phishing T1566.001 Phishing: Spearphishing Attachment

The RTF document contains multiple OLE object data sections and uses OLE activation techniques, indicating it's designed to embed and potentially execute external content. The document body explicitly instructs the user to 'enable editing', a common lure for macro-enabled malware droppers. While no specific scripts were extracted, the heuristics strongly suggest the file's purpose is to exploit OLE object embedding to deliver a payload.

Heuristics 6

Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED

RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
\objupdate forces OLE activation high RTF_OBJUPDATE

RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
OLE object data medium RTF_OBJDATA

RTF contains 3 \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.
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000989.bin` `7748ca72a70c9b44bd4ad6538d4b417cff8069d7dea40aa69e6b6bba62d8c63c`	rtf-objdata-decoded	RTF \objdata at offset 0x989	12902 bytes
`objdata_01_off00006ffa.bin` `0d5d09fb7e87d140659b8f662dc3a7b92cd848450a431d1974047996c57d1f01`	rtf-objdata-decoded	RTF \objdata at offset 0x6FFA	2632 bytes
`objdata_02_off00008595.bin` `cfdf79b95584afe599f8bd01e391d8904839d9495e407a353433d3f5e3be3602`	rtf-objdata-decoded	RTF \objdata at offset 0x8595	12261 bytes

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