RTF / .DOC malware analysis — malicious · 4a726c462cbfcf07

MALICIOUS

RTF / .DOC

344.9 KB

MD5: ce435eb28ec2e05ebb4b86bf411076b1 SHA-1: e24149b3d551cb20873b2e2a2ff4a832422bbf49 SHA-256: 4a726c462cbfcf07afad3a19e4248441df9198a5e270ac468db93af751d48c4f

140 Risk Score

Malware Insights

MITRE ATT&CK

T1559.001 Component Object Model and Distributed Component Object Model T1204.002 Malicious File

The RTF document contains multiple OLE objects, with specific heuristics indicating the use of ".objupdate" and Composite Monikers, strongly suggesting an attempt to trigger OLE activation and execute embedded code. One of the extracted artifacts, objdata_00_off000007ce.bin, is flagged as suspicious due to script execution terms. The attack pattern involves leveraging these OLE object vulnerabilities to achieve arbitrary code execution.

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` `03fb3cd76340ba3ead5d238794caa46f1244d8ac7ce7c2e87c78ac7ec3d6ef77`	rtf-objdata-decoded	RTF \objdata at offset 0x7CE	78433 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`objdata_01_off000285af.bin` `ad7bf1923f855fca5949d0c557a2a819b106cd84b204870bcc59064eb0c6e331`	rtf-objdata-decoded	RTF \objdata at offset 0x285AF	2632 bytes
`objdata_02_off00029b52.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x29B52	12297 bytes

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