RTF malware analysis — malicious · 275fcc93a0e6283d

MALICIOUS

RTF

30.6 KB First seen: 2019-05-31

MD5: f70402811baf252c7adf59eae38a8c46 SHA-1: f9a308adada9a9081ef82ec8199bebefe35296b6 SHA-256: 275fcc93a0e6283d8bc3ac2d107bee984795aeb0e8ec56ef8c301d92a8cdb604

140 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains high-severity heuristics indicating the presence of OLE objects that are automatically linked and updated. These objects likely contain a URL moniker designed to download and execute a secondary payload, a common technique for initial execution of malware. The specific URL is obfuscated but the presence of the moniker is a strong indicator of malicious intent.

Heuristics 4

URL Moniker in RTF OLE object high CVE related RTF_URL_MONIKER_RELATED

RTF contains a URL Moniker GUID in OLE object context, but no decoded remote target was confirmed. Treat as related OLE2Link attack-surface evidence rather than proof of CVE-2017-0199 exploitation.
Automatically linked OLE object high RTF_OBJAUTLINK

RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
\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 1 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0000546a.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x546A	3306 bytes
SHA-256: `65f9b998f32f760527e78b2ce03df2805279213c97f661fbf3a47cc549bbda19`

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