RTF malware analysis — malicious · 1d0f4b56524f0e8a

MALICIOUS

RTF

813.4 KB Created: 2019-01-22 14:09:00 Authoring application: LibreOffice/7.0.1.2$Linux_X86_64 LibreOffice_project/7cbcfc562f6eb6708b5ff7d7397325de9e764452

MD5: 03d11e6b979a69b7ebda725436ab236e SHA-1: 98ff07105b6e3972f79d9ad872730a2a7da1063d SHA-256: 1d0f4b56524f0e8aa3813ae9f2cdbf5a272167e28f11c3822c95d415347e5ba1

160 Risk Score

Malware Insights

MITRE ATT&CK

T1559.001 Component Object Model T1059.001 PowerShell

The RTF file contains multiple high-severity heuristics indicating the presence and automatic activation of OLE objects, including composite monikers. These findings suggest the file is designed to exploit OLE vulnerabilities to execute embedded code. While the document body appears to be legitimate product information, the technical indicators point towards a malicious exploitation of the RTF format's object handling capabilities.

Heuristics 5

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.
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 3 \objdata section(s) — embedded OLE objects
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off000818cb.bin` `2af49d5cc6d298b6cc58f7d980beabf17d063d3f2e82090222f8d9e349856544`	rtf-objdata-decoded	RTF \objdata at offset 0x818CB	54253 bytes
`objdata_01_off0009d1f7.bin` `49e917656a608562bf2acf07b354dae0fb27b709ba3b6670bb4fd05296862492`	rtf-objdata-decoded	RTF \objdata at offset 0x9D1F7	2632 bytes
`objdata_02_off0009e79a.bin` `e8d4fe950caed6dcfde26f4b616825bbe11b93458425974b7d075167f675abf7`	rtf-objdata-decoded	RTF \objdata at offset 0x9E79A	12297 bytes

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