RTF / .DOC malware analysis — malicious · 4a7a13ba08273794

MALICIOUS

RTF / .DOC

226.9 KB

MD5: 4fbef7f81f171bc5845f6936a62a1284 SHA-1: 3f04850b6fc1fb9fdf41f41497ab94c84818e4f9 SHA-256: 4a7a13ba08273794791279b5fd252100f601c2477ae07b5fbceb880a96293f31

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.005 Visual Basic

The RTF document contains multiple OLE objects, with specific heuristics indicating automatic linking and update triggers. This suggests the document is designed to exploit OLE object activation to execute embedded content, likely a malicious payload, bypassing user security prompts. The presence of a 'Macro/content-enable lure' heuristic further supports this, indicating the document attempts to trick the user into enabling content execution.

Heuristics 6

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
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000965.bin` `adf458ff71f0fe998a24b8e8ab582e93d958858149e33fa1b2366b6de1fbddb7`	rtf-objdata-decoded	RTF \objdata at offset 0x965	19476 bytes
`objdata_01_off0000a844.bin` `18cff8ef194415d33763880bf64011d23305e4b9143b76244b89e1c53b70a0d5`	rtf-objdata-decoded	RTF \objdata at offset 0xA844	2632 bytes
`objdata_02_off0000bde7.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0xBDE7	12297 bytes

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