RTF malware analysis — malicious · 61f8b6fb5b364159

MALICIOUS

RTF

661.7 KB First seen: 2015-09-30

MD5: aa794c7eb8b04dcb53b3dab5746a4730 SHA-1: 2fb8d7fb52891299e4f71756e9f1d29db13eb364 SHA-256: 61f8b6fb5b364159f678df45c76cd03efbb00caad15285334f85c99ae727d2fd

144 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is an RTF file that contains embedded OLE objects and triggers a high-severity heuristic for CVE-2012-0158, indicating exploitation of a client execution vulnerability. It also includes a remote URL that is likely used to download a secondary payload. The document body is heavily obfuscated and does not provide clear textual clues.

Heuristics 7

MSCOMCTL.ListView — CVE-2012-0158 high CVE related CVE_2012_0158

RTF \objdata decodes to OLE data containing the MSCOMCTL.ListView — CVE-2012-0158 CLSID — the vulnerable control/moniker is embedded directly in the document's object stream, the delivery shape of this exploit. RTF objects auto-render when Word opens the file.
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://37.139.47.211/webstat/img.php?id=77889433 In RTF body

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off000000dd.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xDD	129472 bytes
SHA-256: `14badcd6294775c8d70772792cbcab0e821e4d2eb93c63eb517029cde4fc9f1e`
`objdata_01_off00040f9c.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x40F9C	4337 bytes
SHA-256: `c8283cf0e0568af41d4d00735fe84d00ea96b37abbca7a5fd42640dc03962be4`
`objdata_02_off000433e4.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x433E4	167010 bytes
SHA-256: `ddb6c57f42e1fa281c95d11a7fcc8a0348a683c17ad650c4dc6c39ec002b1492`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.56, consistent with packed or encrypted content.

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