RTF / .DOC malware analysis — malicious · a85a99ac83316ab4

MALICIOUS

RTF / .DOC

536.4 KB

MD5: 240e606c6ce1eb91a5fe12ea4c606eed SHA-1: 5ec39049c101b2a6960f6f5c09dce6dd602670f3 SHA-256: a85a99ac83316ab49d1a26b8688290a5da096d274bf09fae9b7df94fe5e1ef05

180 Risk Score

Malware Insights

MITRE ATT&CK

T1204 User Execution T1204.002 Malicious File T1559 Component Object Model Hijacking T1559.001 Component Object Model Hijacking

The RTF document contains multiple OLE objects, including automatically linked and updated objects, which are designed to activate embedded content. The presence of an 'enable lure' heuristic indicates the document likely instructs the user to enable macros or editing to facilitate the execution of malicious code. This points to a delivery mechanism for a secondary payload, though no specific family is identifiable from the provided evidence.

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_off00000bb0.bin` `14d6fc8a0ebf6ac61149e7b9119945022308af891b5a2daa5d3da371526e49f9`	rtf-objdata-decoded	RTF \objdata at offset 0xBB0	171558 bytes
`objdata_01_off00057e39.bin` `9d9bc825f2fa5e0ed8db7dce6823e199ad9c775873472d42887214589f205470`	rtf-objdata-decoded	RTF \objdata at offset 0x57E39	2632 bytes
`objdata_02_off000593dc.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x593DC	12297 bytes

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