RTF / .DOC malware analysis — malicious · 42470aa131fa6fe1

MALICIOUS

RTF / .DOC

340.8 KB

MD5: 205145c02bb408faff7b5230ec588914 SHA-1: 55f83b9634b72174d61d2b75646b40ea506eda4a SHA-256: 42470aa131fa6fe1faa44f6f9ad7dc39a90b125213c6b0b9c29132cfcf9f82d1

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 automatically activate and execute embedded content upon opening, a common lure to bypass security measures and deliver a malicious payload. The 'SE_ENABLE_LURE' heuristic further supports this, indicating the document likely instructs the user to enable content. No scripts were extracted, and no document body was available for analysis.

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` `eedfb89d8eea05c6dfa5573725f3a28d50f5cee9b7f1089b3446ac5f1d37924d`	rtf-objdata-decoded	RTF \objdata at offset 0x965	75553 bytes
`objdata_01_off00026fe4.bin` `18cff8ef194415d33763880bf64011d23305e4b9143b76244b89e1c53b70a0d5`	rtf-objdata-decoded	RTF \objdata at offset 0x26FE4	2632 bytes
`objdata_02_off00028587.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x28587	12297 bytes

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