RTF malware analysis — malicious · 0bdaeb3e6b9e35fd

MALICIOUS

RTF

339.9 KB First seen: 2018-06-14

MD5: ad78abc8c76d42b31e92ecb1b2bd5b4e SHA-1: 6b339929eebec96a1bbd2d278404159b3c851994 SHA-256: 0bdaeb3e6b9e35fd587fc8c9b1318c97a63309a6389df7d7844cb3ae88400b79

220 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains embedded OLE object data and specifically triggers heuristics related to Equation Editor and OLE activation. ClamAV identifies this as Rtf.Exploit.CVE_2017_11882-6584355-1, indicating exploitation of the CVE-2017-11882 vulnerability. This vulnerability allows for arbitrary code execution when the embedded Equation Editor object is activated.

Heuristics 5

Equation Editor CLSID critical CVE likely RTF_EQUATION_EDITOR

Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM

RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
ClamAV: Rtf.Exploit.CVE_2017_11882-6584355-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_11882-6584355-1
\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

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off000000a0.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xA0	107018 bytes
SHA-256: `dbd2f3422c2aa8fbebfb01dfbe72b2aaaf75a9a808e9210f36096023747ab87f`

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