RTF / .DOC malware analysis — malicious · c03c78f82f01b7d6

MALICIOUS

RTF / .DOC

383.5 KB

MD5: a3030c1310540e1c430ab18a64cca6e5 SHA-1: 0c20a9c30487610c655b393cf02324fc056232ac SHA-256: c03c78f82f01b7d63da5ec6c64b58170d85dc6b4c0cbfe90bf634fffe352ce75

140 Risk Score

Malware Insights

MITRE ATT&CK

T1559.001 Component Object Model Hijacking T1204.002 Malicious File

The RTF document contains multiple OLE objects, with specific heuristics indicating the use of ` extdata` and ` extupdate` to trigger OLE activation. This strongly suggests the document is designed to exploit OLE vulnerabilities to execute embedded code. No specific malware family could be identified from the available evidence.

Heuristics 5

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
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_off000007ce.bin` `4cd8eb24b43b391f653f26780ea7399bf00e2853ba29810fcd4d0e02d14a331b`	rtf-objdata-decoded	RTF \objdata at offset 0x7CE	97419 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`objdata_01_off00031ff3.bin` `ad7bf1923f855fca5949d0c557a2a819b106cd84b204870bcc59064eb0c6e331`	rtf-objdata-decoded	RTF \objdata at offset 0x31FF3	2632 bytes
`objdata_02_off00033596.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x33596	12297 bytes

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