RTF malware analysis — malicious · e31ee38a801a9d3e

MALICIOUS

RTF

303.0 KB

MD5: 1880cee1f8d539fa8e2ecdb219a1379f SHA-1: e44bfee7ff0b2dd5201b0bc3673f32c986e1d9f8 SHA-256: e31ee38a801a9d3e09c40f876a011ee8bc26dc6741dc02d6e1950bd9a518eed4

160 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The RTF file contains multiple OLE objects, with heuristics indicating that \objupdate forces OLE activation and a Composite Moniker is present. The document body explicitly instructs the user to 'click Enable Editing', which is a common lure to bypass macro security settings and execute embedded content. This suggests the file is designed to exploit OLE object activation 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_off00000b44.bin` `141ebe396ae8a5780fc757e111325d797f75a6e2f64ed344c6b21ca675ce86b7`	rtf-objdata-decoded	RTF \objdata at offset 0xB44	59017 bytes
`objdata_01_off0001d95b.bin` `12289ea42203fe86d5d6e86e52672f752ead5709842d0443203b40a4917d5ece`	rtf-objdata-decoded	RTF \objdata at offset 0x1D95B	12261 bytes
`objdata_02_off0002396d.bin` `5de732ece55617b212baa0db7102c497ed7e809d372953a6a31ff14adb5754f5`	rtf-objdata-decoded	RTF \objdata at offset 0x2396D	2632 bytes

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