RTF malware analysis — malicious · c1b9d7ff0d5af895

MALICIOUS

RTF

272.0 KB Created: 2018-07-13 13:19:00 First seen: 2021-02-23

MD5: 03c044683241d11926d077f5c6bde05a SHA-1: f1e61f1ee3a7b9185fed62be18f4828a1b10862b SHA-256: c1b9d7ff0d5af8952f07de2cf76b2c617429ad8448bbc73d9e6d17e0cc2cb921

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.Sload-7135989-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Malware.Sload-7135989-0
\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 4 \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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00003c40.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3C40	24635 bytes
SHA-256: `beddc845f0863e435c5a6186517a4b61e9a3ce180a319518e0572f2a76b05160`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_01_off0001548d.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x1548D	24635 bytes
SHA-256: `18a94a2803f9e779b8d024b0fba55f10d02550f9243174ba644ffa95fa0bc731`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_02_off00026cda.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x26CDA	24635 bytes
SHA-256: `ef448ce4008f288003ac846cce4bb4bef9e2be50876ccea3b151a97aa92dfc26`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_03_off00038527.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x38527	23727 bytes
SHA-256: `a9b08883949c5984522e0bd4fc26099dc81383b3584231869980ad4a02521659`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely

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