RTF malware analysis — malicious · 08882f48205b8d27

MALICIOUS

RTF

282.3 KB

MD5: 09c7ae5468cbeb5a1b954a7281c17de6 SHA-1: 3a3e0f84afa6e98657850474be230d2fdb562892 SHA-256: 08882f48205b8d271779e29e377012af4e675eedff448d3a49efbc90c40976da

240 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The RTF file contains OLE object data and triggers an objupdate event, indicative of an attempt to exploit CVE-2017-8570. This vulnerability is known to drop and execute a script, likely a second-stage payload. The document body contains a lure to 'Enable Editing', further supporting the malicious intent.

Heuristics 8

Composite Moniker — CVE-2017-8570 (drops SCT script) critical CVE related CVE_2017_8570

RTF \objdata decodes to OLE data containing the Composite Moniker — CVE-2017-8570 (drops SCT script) CLSID — the vulnerable control/moniker is embedded directly in the document's object stream, the delivery shape of this exploit. RTF objects auto-render when Word opens the file.
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` `9c847354b7f4e509bee09cac8518449b1af2645a94490f24575af51366c214a8`	rtf-objdata-decoded	RTF \objdata at offset 0xB44	48442 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s).
`objdata_01_off000186bd.bin` `12289ea42203fe86d5d6e86e52672f752ead5709842d0443203b40a4917d5ece`	rtf-objdata-decoded	RTF \objdata at offset 0x186BD	12261 bytes
`objdata_02_off0001e6cf.bin` `5de732ece55617b212baa0db7102c497ed7e809d372953a6a31ff14adb5754f5`	rtf-objdata-decoded	RTF \objdata at offset 0x1E6CF	2632 bytes

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