RTF malware analysis — malicious · 4fcfef0b1ccb37ea

MALICIOUS

RTF

526.2 KB Created: 2018-06-19 10:51:00 First seen: 2021-02-23

MD5: 0bc543753aa5665f5306ad3f46d30776 SHA-1: abfbc362bc3b8e01f3241b700ea4b4866c2636ee SHA-256: 4fcfef0b1ccb37eaac977c1430467dc0321919e2f0637082bd3e4df261d76346

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_off00003d4d.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3D4D	35899 bytes
SHA-256: `f82e599778abbed53ce14dcc85f44c70463c6bdac5db5b3b385462fbe97c745d`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_01_off0001aed5.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x1AED5	35899 bytes
SHA-256: `1bb3b0793fc4cf460c6cf4db51d4b7bd5536ed8e07bba1dd071aaf93148d6320`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_02_off0003205d.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3205D	35899 bytes
SHA-256: `d9c6be6b4863cb0fc69c9535d5a4cdcdeefec46d0ce5bf8517caa1f0141773f7`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_03_off000491e5.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x491E5	35899 bytes
SHA-256: `cf6d84a7387c71a2cdd7acf1a2d6cafa264b188e03c09809167b6216ca1a27d8`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_04_off0006036d.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x6036D	35899 bytes
SHA-256: `a6fc8323ef808c63df2c0b8a963fbced383146e9f965d117d7c6a8aaf0b541fc`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely

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