RTF malware analysis — malicious · f72a820fe5b42c73

MALICIOUS

RTF

260.9 KB

MD5: 5116567060422e6f333ae17f888980c0 SHA-1: d26668ea7be28dbaa66a1d1ceff61923c960f964 SHA-256: f72a820fe5b42c73dfc84c6968767e7c90c075835e20f6717426280f7f89bc8d

180 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1559.001 Component Object Model Hijacking

The RTF file contains multiple embedded OLE objects, with specific heuristics indicating that \objupdate forces OLE activation and that composite monikers are present. The document body explicitly prompts the user to 'click Enable Editing', a common lure to bypass macro security. This suggests the embedded OLE objects are intended to be activated, likely to execute a malicious payload.

Heuristics 7

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
Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000b44.bin` `4da240a3ecb16a0bd5f014513df51cdf367dd26f2352d99c08a9c5fe3322fc90`	rtf-objdata-decoded	RTF \objdata at offset 0xB44	37500 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s).
`objdata_01_off00013141.bin` `12289ea42203fe86d5d6e86e52672f752ead5709842d0443203b40a4917d5ece`	rtf-objdata-decoded	RTF \objdata at offset 0x13141	12261 bytes
`objdata_02_off00019153.bin` `a483f12dcb6e4b0551213d4a635fd37957956b42b40e2fc9f057edbc2419eb50`	rtf-objdata-decoded	RTF \objdata at offset 0x19153	2632 bytes

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