RTF / .DOC malware analysis — malicious · e8b2cdf9e9676f57

MALICIOUS

RTF / .DOC

390.4 KB Created: 2022-09-15 First seen: 2022-09-21

MD5: 0fd7f9024fa8f517377567506e46ee7d SHA-1: 08e14fc1f09547e4619117528882797474ad68e4 SHA-256: e8b2cdf9e9676f57b754986984d914d96d5ee259c9e037e155301112e594f6ef

262 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter T1566 Phishing T1566.001 Phishing: Spearphishing Attachment

The file is an RTF document that leverages multiple critical vulnerabilities (CVE-2017-8570 and CVE-2017-8759) related to OLE object activation. The heuristics indicate the embedding and activation of OLE objects, specifically mentioning Composite Moniker and MSXML SAX OLE activation, which are known vectors for exploiting these CVEs. This strongly suggests the document is designed to drop and execute a malicious script or payload.

Heuristics 8

Composite Moniker — CVE-2017-8570 (drops SCT script) critical CVE related CVE_2017_8570

RTF \objdata decodes to OLE data containing the Composite Moniker — CVE-2017-8570 (drops SCT script) 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.
CVE-2017-8759 — MSXML SAX OLE activation critical CVE likely CVE_2017_8759

RTF contains a hex-encoded OLE1 object for Msxml2.SAXXMLReader.6.0 followed by an embedded OLE compound document, and the document requests OLE activation. This matches the RTF staging shape used for CVE-2017-8759 SOAP/WSDL parser code injection.
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.
\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 3 \objdata section(s) — embedded OLE objects
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object
Suspicious extracted artifact medium 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0000e144.bin` `ec0a46789d30442d7159efcc1be3475797a14a86d0d79c5e6f4b1a63c0ba72aa`	rtf-objdata-decoded	RTF \objdata at offset 0xE144	74049 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`objdata_01_off00033b88.bin` `43dc420203828d24ec36adf809a9ada54bc1f182c6dd7bd39e852b7059bf1a1d`	rtf-objdata-decoded	RTF \objdata at offset 0x33B88	2632 bytes
`objdata_02_off0003512b.bin` `142dc43284d9abe994719f8fb67bc4c04bfc3f07528a1a66b0bad7e552ee8e78`	rtf-objdata-decoded	RTF \objdata at offset 0x3512B	12297 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.