RTF malware analysis — malicious · 9afb3346f26a4d52

MALICIOUS

RTF

228.1 KB

MD5: 583582e43de70fc0106160420f9a0e26 SHA-1: ed90e1aa77cea14d15b11b85c50a60dd16c074d8 SHA-256: 9afb3346f26a4d52e7d27638ee464e2f57d86545ef66dcf6b5e8bacf0de6f91f

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1204.002 Malicious File

The RTF file contains multiple embedded OLE objects, with a specific \objupdate directive identified. This strongly suggests an attempt to exploit OLE object activation to execute arbitrary code. The presence of embedded binary data, identified as objdata artifacts, further supports this. The document body's content, consisting of various text formatting styles, does not provide a direct lure, but the heuristic SE_ENABLE_LURE indicates a general attempt to trick the user into enabling content. The primary attack vector appears to be the exploitation of OLE object handling within RTF documents.

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_off00005565.bin` `3a7bf754150c5cb0a9cabd8b28d03763dbe9305ee70b4ba1bff3f1f0b26e7e89`	rtf-objdata-decoded	RTF \objdata at offset 0x5565	11180 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s).
`objdata_01_off0000adc2.bin` `3acc104551ed66a0b887faa2f93081783f78d431d81249e2c401c14e62aac774`	rtf-objdata-decoded	RTF \objdata at offset 0xADC2	12261 bytes
`objdata_02_off00010dd4.bin` `a483f12dcb6e4b0551213d4a635fd37957956b42b40e2fc9f057edbc2419eb50`	rtf-objdata-decoded	RTF \objdata at offset 0x10DD4	2632 bytes

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