RTF / .DOC malware analysis — malicious · 0b2b86fd83fe12e0

MALICIOUS

RTF / .DOC

131.6 KB

MD5: 98f3ef92e9c7df85806761a3b68359ec SHA-1: e2b88c6311cc625fc94d7142051e54d3dfe2bc62 SHA-256: 0b2b86fd83fe12e0698e392532be1adbac67eb59807997368e233aba81f8434c

202 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is an RTF document identified as malicious due to the presence of an embedded OLE object and a critical heuristic firing for Equation Editor exploitation. Specifically, the ClamAV detection points to Rtf.Exploit.CVE_2018_0802-6825822-0, indicating exploitation of a vulnerability in the Equation Editor component. This technique is commonly used to achieve arbitrary code execution, often to download and run a second-stage payload.

Heuristics 6

Equation Editor CLSID critical RTF_EQUATION_EDITOR

Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
ClamAV: Rtf.Exploit.CVE_2018_0802-6825822-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Rtf.Exploit.CVE_2018_0802-6825822-0
\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 1 \objdata section(s) — embedded OLE objects
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object
Suspicious extracted artifact info 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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0000180e.bin` `fc5f4b8ce444aff2639644cce320fa24bcc31a43a200cee9088fbdaad6068149`	rtf-objdata-decoded	RTF \objdata at offset 0x180E	64092 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.93, consistent with packed or encrypted content.

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