RTF / .DOC malware analysis — malicious · 1caadbc09c710b7c

MALICIOUS

RTF / .DOC

384.0 KB

MD5: 1956fa2feaef4b6fcf3e63f51aa26722 SHA-1: b35003f1c1a874468dbe41370cea443aafb10915 SHA-256: 1caadbc09c710b7cdd91598babd238a59708111a59487888bb00f3945c09103c

140 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF document contains multiple OLE objects, with specific heuristics indicating the use of \objdata and \objupdate to force OLE activation. This suggests the document is designed to exploit vulnerabilities related to OLE object handling, likely leading to the execution of embedded malicious code. The extracted artifacts, objdata_00_off000007de.bin, objdata_01_off000321e7.bin, and objdata_02_off0003378a.bin, are the direct result of this exploitation.

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_off000007de.bin` `dd539e173eb70277a6847119d9a8e34ee3b71436c788813879004181289c7338`	rtf-objdata-decoded	RTF \objdata at offset 0x7DE	97652 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`objdata_01_off000321e7.bin` `ad7bf1923f855fca5949d0c557a2a819b106cd84b204870bcc59064eb0c6e331`	rtf-objdata-decoded	RTF \objdata at offset 0x321E7	2632 bytes
`objdata_02_off0003378a.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x3378A	12297 bytes

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