RTF malware analysis — malicious · 8891c359e0ad2466

MALICIOUS

RTF

515.9 KB First seen: 2015-09-21

MD5: 4067753a5d925d9b56c850f479d39850 SHA-1: ff6561bebc8b49c342f76153cb6fd2d9d0574a42 SHA-256: 8891c359e0ad2466255936dce481174aa7a67e560cc025d008e6f164796a4a5d

142 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains multiple OLE object data sections and exhibits characteristics indicative of the CVE-2012-0158 vulnerability, which allows for client-side code execution. The presence of 'objdata' sections and specific CLSID indicators strongly suggests exploitation of this vulnerability. While no scripts were directly extracted, the exploitation mechanism implies the execution of a secondary payload, likely downloaded from an external source.

Heuristics 6

MSCOMCTL.ListView — CVE-2012-0158 high CVE related CVE_2012_0158

RTF \objdata decodes to OLE data containing the MSCOMCTL.ListView — CVE-2012-0158 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.
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.
Suspicious extracted artifact info 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_off0000009f.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x9F	56872 bytes
SHA-256: `4c6d5f682b75a228cab2bf40fb9f0e1e2815e51e9027079246839d27ef88a539`
`objdata_01_off0001c9d6.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x1C9D6	4337 bytes
SHA-256: `3cb43c136e743016f68618bcf3b7cf49f95b543e689c292f6422440274040c94`
`objdata_02_off0001ee12.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x1EE12	167010 bytes
SHA-256: `6db4481baedb887bcaaded346fd14d386b9b8def5cbb28f29828a8a28e96943d`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.56, consistent with packed or encrypted content.

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