RTF malware analysis — malicious · 5a20f9b9a09c1b32

MALICIOUS

RTF

498.9 KB Created: 2018-06-19 11:56:00 First seen: 2021-02-23

MD5: 91c996f1866cb646d34e4ca052f42ad7 SHA-1: aed0b93023256ee828ff4fc23ad6d9ad2d412cf5 SHA-256: 5a20f9b9a09c1b32fe07bc8c9402b807637498b380914883ce1ea6faf7639eb3

242 Risk Score

Heuristics 6

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
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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00003930.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3930	35899 bytes
SHA-256: `166d5d5a60326b7ccd5b9c19f3c341c114cbd9431f600990fc61e90ab4050ad7`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_01_off0001aa31.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x1AA31	35899 bytes
SHA-256: `527f0865cb147ea9098629df6b68448048ca6ad85d033831e08766a8021d6e77`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_02_off00031b32.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x31B32	35899 bytes
SHA-256: `fb2410025c25ef1790f6290987bd395739150ac67c425e7cd2eddda175b01418`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_03_off00048c33.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x48C33	35899 bytes
SHA-256: `7d15c93579a850bcb02cbc6c445bd177a1116d8616881909417769ea44f55145`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_04_off0005fd34.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x5FD34	35899 bytes
SHA-256: `9ba413bd6542e736367a1657347ea0d64270f9d1c5eabb815ca6d7bf7076fbe7`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely

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