RTF malware analysis — malicious · 1fb90c5f6ba8201b

MALICIOUS

RTF

499.7 KB Created: 2018-06-02 07:24:00 First seen: 2021-02-23

MD5: 35c539c31f3941cf932a36b4f0cb103c SHA-1: 36ef12bc9df6ce9e78d8a6cbe88121a292497028 SHA-256: 1fb90c5f6ba8201b890c670197eb01fdabd186609093c42534426eff060520da

262 Risk Score

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.
ClamAV: Xls.Malware.Generic-6834349-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Malware.Generic-6834349-0
\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 5 \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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://schemas.microsoft.com/office/word/2003/wordml In RTF body

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00003b7b.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3B7B	35899 bytes
SHA-256: `f82e01b07e536d9870a48ae41f838c612333b2fee58ef0a73e322bb69a4dfdc2`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_01_off0001acb2.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x1ACB2	35899 bytes
SHA-256: `ad6a3188abd9fc7c27fa6d454d76ccb309fadef1bcfaa9476e630b7ae4b9ec84`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_02_off00031de9.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x31DE9	35899 bytes
SHA-256: `26a7b5c667e65f538b20744b0663a78ff7427850cc98c0e34e80a1063e4ab858`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_04_off00060057.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x60057	35899 bytes
SHA-256: `c3432c00743ee6201bb7b84275134520770366b4976719eab160336f69f8b357`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely

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