RTF malware analysis — malicious · b226bf4fc8cf501a

MALICIOUS

RTF

274.4 KB

MD5: 7f62a4715b9f520125e4a4bea9652b22 SHA-1: 4e0120a48c9595976f7653786861527785d2fb8e SHA-256: b226bf4fc8cf501a9c85d671edc2f6d33a7cd2577d15e95f396228677d0cd158

180 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1059 Command and Scripting Interpreter T1059.005 Command and Scripting Interpreter: Visual Basic

The RTF document contains multiple OLE objects, including embedded objects and presentation streams, which are activated via the \objupdate directive. The presence of a composite moniker further suggests an attempt to exploit OLE object handling. The document body explicitly prompts the user to 'Enable Editing', a common lure to bypass macro security settings and execute embedded malicious content. While no scripts were directly extracted, the heuristics indicate the OLE objects likely contain or facilitate the execution of 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` `b5ca26e75d3c690dd68a775a7e5f243376238a668a0fd3a33a756bb7db6db18e`	rtf-objdata-decoded	RTF \objdata at offset 0xB44	44415 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s).
`objdata_01_off00016747.bin` `12289ea42203fe86d5d6e86e52672f752ead5709842d0443203b40a4917d5ece`	rtf-objdata-decoded	RTF \objdata at offset 0x16747	12261 bytes
`objdata_02_off0001c759.bin` `5de732ece55617b212baa0db7102c497ed7e809d372953a6a31ff14adb5754f5`	rtf-objdata-decoded	RTF \objdata at offset 0x1C759	2632 bytes

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