RTF / .DOC malware analysis — malicious · 99ce68472dfb792c

MALICIOUS

RTF / .DOC

217.8 KB First seen: 2022-04-14

MD5: 0b0d48dca3d9fae28f131ee32fd5ed8d SHA-1: 79b804a42d00c7fc7c8199e3fb3bbdbe59423ea4 SHA-256: 99ce68472dfb792c71a6df3eebab739f7b413d3c92e69a6db13d5f97c4d4699c

160 Risk Score

Malware Insights

MITRE ATT&CK

T1204 User Execution T1204.002 Malicious File T1566 Phishing T1566.001 Spearphishing Attachment

The RTF document contains embedded OLE objects and uses an \objupdate directive, indicating an attempt to activate embedded content. The document body explicitly instructs the user to 'download the document and click Enable Editing', a common lure for macro-enabled malware. The presence of embedded artifacts suggests these are likely payloads or components thereof, intended to be executed upon user interaction.

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.
\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
Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0000095d.bin` `075040ced9a888450e5418de2f20c12e8bf9fb64bf22b682723cfa2baabb5d3a`	rtf-objdata-decoded	RTF \objdata at offset 0x95D	15670 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`objdata_01_off0000894d.bin` `36dcadcd9dba6c796320cf103eee4d99a0cf65218f74bac40d0f472a6487a1f8`	rtf-objdata-decoded	RTF \objdata at offset 0x894D	2632 bytes
`objdata_02_off00009ef0.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x9EF0	12297 bytes

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