RTF / .DOC malware analysis — malicious · 597a9275c3d15c81

MALICIOUS

RTF / .DOC

536.4 KB

MD5: cfbf0bb5595dddbd9e2d4b1bdef25762 SHA-1: 9a70e46aa5bed70fa3a9a86bae0c9d4f372b8334 SHA-256: 597a9275c3d15c813a7c62ec5d8bd5cd68eb3a1e7ab1f06b85e7d1f262610ccd

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 lure for malware droppers. The embedded OLE objects are the primary mechanism for delivering a secondary payload, though the specific nature of that payload cannot be determined 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` `4045376527844a3be405c64d307300758db9fe9c3f8ec1279701946cdc662d1e`	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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