RTF / .DOC malware analysis — malicious · f5fab1f13cc0df6b

MALICIOUS

RTF / .DOC

307.3 KB

MD5: f11edd8f122829ab3b3a69397e345250 SHA-1: 31c9d13f4554240fe2eb6bd9c9042862e5a5920a SHA-256: f5fab1f13cc0df6b37eb6a308adbfac7dc8e3d376a85a744fbf3fe8c1419ece0

180 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1566 Phishing T1566.001 Phishing: Spearphishing Attachment

The RTF document contains multiple OLE objects, with heuristics indicating automatic linking and forced updates ( RTF_OBJAUTLINK, RTF_OBJUPDATE). This suggests the document is designed to exploit OLE object activation to deliver a payload. The SE_ENABLE_LURE heuristic confirms the presence of a user-enablement lure, a common tactic for macro-based malware delivery.

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_off00000969.bin` `f58b60213700eff94ec7c052d030ac52618561412af79e4b278bb941bbe9192d`	rtf-objdata-decoded	RTF \objdata at offset 0x969	59037 bytes
`objdata_01_off0001e9b6.bin` `9d9bc825f2fa5e0ed8db7dce6823e199ad9c775873472d42887214589f205470`	rtf-objdata-decoded	RTF \objdata at offset 0x1E9B6	2632 bytes
`objdata_02_off0001ff59.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x1FF59	12297 bytes

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