RTF malware analysis — malicious · 03cb76bdc619fac4

MALICIOUS

RTF

1005.3 KB Created: 2016-05-20 18:50:00 First seen: 2020-12-25

MD5: c13655fee08417cffa04d1bf71af4ad1 SHA-1: ef755f3fa59960838fa2b37b7dedce83ce41f05c SHA-256: 03cb76bdc619fac422d2b954adfa511e7ecabc106adce804b1834581b5913bca

244 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: Doc.Exploit.CVE_2015_1641-6397417-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Exploit.CVE_2015_1641-6397417-0
Large hex data blocks in OLE object high RTF_EXCESSIVE_HEX

RTF contains ~1000KB of hex-encoded data inside \objdata sections — may hide a payload
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
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.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00002bad.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x2BAD	3760 bytes
SHA-256: `ea1cb415a207dc1dfdf1c824d6d48806fb2035488cdfae51cd686cc2d4284772`
`objdata_01_off00004f91.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x4F91	476721 bytes
SHA-256: `e3636eb1008dddc77ebf8b2ebeb3ba5e45dcca1864dcf7000fa31d2f53ecb4df`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.74, consistent with packed or encrypted content.
`objdata_02_off000f013e.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xF013E	11825 bytes
SHA-256: `46bc32f5cf0548e6d8a0923556b81d5ecadda0d8e278053269af96cb61d11831`
Detection ClamAV: Doc.Exploit.CVE_2015_1641-6397417-0 Obfuscation or payload: unlikely

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