RTF malware analysis — malicious · 36f167b2e513c13a

MALICIOUS

RTF

1.43 MB Created: 2016-02-04 19:05:00 First seen: 2019-06-27

MD5: 6bbff51cbd1c2b5bc6783c154dd8d3b5 SHA-1: 2d005c9a9691f7317ec141518099f2c7c7a40211 SHA-256: 36f167b2e513c13a64c966fd367014baf8c112723d58c7b1bee31fe21a63a97d

304 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains OLE objects with excessive hex data, indicative of a hidden payload. Critical heuristics identified an exploit for CVE-2015-1641 and an embedded remote URL, http://www.matelia-sports.com/PLA/. This suggests the file is designed to exploit this vulnerability to download and execute a secondary payload from the specified URL.

Heuristics 9

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 ~1425KB of hex-encoded data inside \objdata sections — may hide a payload
INCLUDETEXT/INCLUDEPICTURE remote URL high RTF_INCLUDE_REMOTE

RTF document uses INCLUDETEXT or INCLUDEPICTURE with an http:// URL — Word can fetch the remote content on open depending on Office version and external-content settings, enabling remote template injection, NTLM capture via redirects, or payload delivery
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
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.
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://www.matelia-sports.com/PLA/ In RTF body
- http://schemas.microsoft.com/office/word/2003/wordmlIn RTF body

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0004464c.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x4464C	6372 bytes
SHA-256: `365bc96aa9bd390a6f5cab1f799a12c67405386f30fcdb30ea4ddc2c73da875a`
`objdata_01_off000481fb.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x481FB	573489 bytes
SHA-256: `a25eca62abdbaad6f1d417772bd4c52f5ded62c55c3c03b21efd70564f8121ac`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.98, consistent with packed or encrypted content.
`objdata_02_off00162adf.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x162ADF	16433 bytes
SHA-256: `ac8397211c1cd7886d49ccd99d0163edaa3711f18fc40ff269159d175e9e4c47`
Detection ClamAV: Doc.Exploit.CVE_2015_1641-6397417-0 Obfuscation or payload: unlikely

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