RTF / .DOC malware analysis — malicious · 27237c634430867f

MALICIOUS

RTF / .DOC

227.7 KB

MD5: 8267d5d2226c81c92af18a02f0f2af74 SHA-1: fd50eb69c9c0195cbbe3f30c2d18c6bba0296666 SHA-256: 27237c634430867f474aa7936cfed730c68815a889a137e1bf61033f9ffc6e1f

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, including automatically linked and updated objects, which are designed to activate embedded content. The 'SE_ENABLE_LURE' heuristic indicates the document likely instructs the user to enable macros or editing, a common social engineering tactic. This suggests the file's primary purpose is to exploit OLE vulnerabilities or trick the user into executing embedded code, likely leading to a second-stage download and 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` `ba20364089b2fa2c07e0348c39f5d314402aaba384b10ade4cbb58582c88b8ce`	rtf-objdata-decoded	RTF \objdata at offset 0x965	19844 bytes
`objdata_01_off0000ab42.bin` `18cff8ef194415d33763880bf64011d23305e4b9143b76244b89e1c53b70a0d5`	rtf-objdata-decoded	RTF \objdata at offset 0xAB42	2632 bytes
`objdata_02_off0000c0e5.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0xC0E5	12297 bytes

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