RTF malware analysis — malicious · abb0382cfa796541

MALICIOUS

RTF

384.6 KB

MD5: f8c33e1a51127f70267ef8cea580c3de SHA-1: 49d639cd7c7f19f2450266d28f3939dfa7ba2e04 SHA-256: abb0382cfa796541190aa75f19fabf5e86d3a0400fd1c64036cdc1eb6b485457

140 Risk Score

Malware Insights

MITRE ATT&CK

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

The RTF file contains multiple OLE objects, with specific heuristics indicating the use of \objdata and \objupdate, strongly suggesting an attempt to exploit OLE activation mechanisms. The presence of embedded OLE objects and the suspicious extracted artifact point towards the execution of malicious code. The file's SHA256 hash is included as a primary IOC.

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_off000007d0.bin` `d081768557b2415a4990b6792ba3dcd17c207e53421f2f2783f397623a5d9c29`	rtf-objdata-decoded	RTF \objdata at offset 0x7D0	97957 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`objdata_01_off00032453.bin` `c1062dbe2c516490ba03c091a3be0d514bef7428a936eb00367c1b3069f9cedc`	rtf-objdata-decoded	RTF \objdata at offset 0x32453	2632 bytes
`objdata_02_off000339f6.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x339F6	12297 bytes

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