RTF malware analysis — malicious · 50d487621decc715

MALICIOUS

RTF

260.9 KB

MD5: e765530feaf53ea90810cfef111c5d5a SHA-1: 05e186e4867b930aabeb50fd3fa8c41957696ead SHA-256: 50d487621decc715e2b3e349679aba07ecb93d3ee55a3605ec0606d11a05dcd2

180 Risk Score

Malware Insights

MITRE ATT&CK

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

The RTF document contains multiple OLE objects, with one specifically triggered by \objupdate, indicating an attempt to execute embedded content. The document body explicitly prompts the user to 'Enable Editing', a common lure to bypass macro security. The presence of embedded OLE objects and the lure strongly suggest this file is designed to drop or execute a secondary 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` `0c96fa5cea6e1940f2c5595965eef1eb8ce4a70a47744823784c7c4360b7d246`	rtf-objdata-decoded	RTF \objdata at offset 0xB44	37496 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s).
`objdata_01_off00013139.bin` `12289ea42203fe86d5d6e86e52672f752ead5709842d0443203b40a4917d5ece`	rtf-objdata-decoded	RTF \objdata at offset 0x13139	12261 bytes
`objdata_02_off0001914b.bin` `a483f12dcb6e4b0551213d4a635fd37957956b42b40e2fc9f057edbc2419eb50`	rtf-objdata-decoded	RTF \objdata at offset 0x1914B	2632 bytes

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