RTF malware analysis — malicious · e4328011bb2b04ab

MALICIOUS

RTF

547.4 KB Created: 2013-05-15 14:05:00 First seen: 2019-01-12

MD5: 6fa4964c48e8210f7344b8d9eaa0aa91 SHA-1: 0495655687364be6ded1ee49aeb332b3398b5a62 SHA-256: e4328011bb2b04abc856ccd04404c9f95d67167f6c291d343e8ffa8aa2aa2099

382 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains multiple indicators of malicious activity, including embedded OLE objects and a critical firing for CVE-2017-8759, which is known to be exploited for client execution. The presence of RTF_MZ_HEX and shellcode candidate regions within extracted artifacts further supports the exploitation of a vulnerability to deliver a payload. The ClamAV detection name 'Rtf.Dropper.Agent' suggests a dropper functionality.

Heuristics 10

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
CVE-2017-8759 — MSXML SAX OLE activation critical CVE likely CVE_2017_8759

RTF contains a hex-encoded OLE1 object for Msxml2.SAXXMLReader.6.0 followed by an embedded OLE compound document, and the document requests OLE activation. This matches the RTF staging shape used for CVE-2017-8759 SOAP/WSDL parser code injection.
ClamAV: Rtf.Dropper.Agent-9965975-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Rtf.Dropper.Agent-9965975-1
PE header (with DOS stub) in hex data critical RTF_MZ_HEX

Hex-encoded PE (MZ + DOS stub) found inside RTF — likely an embedded executable payload
\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.
Package object class high RTF_OBJCLASS_PACKAGE

OLE Package object — can wrap arbitrary files
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://schemas.microsoft.com/office/word In RTF body

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00061464.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x61464	46308 bytes
SHA-256: `240f30e1faed3aa4f574404e6fc3effac689d0bf5637e30e9e16c6840a655435`
`objdata_01_off00077e85.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x77E85	34372 bytes
SHA-256: `d34c901114e2d858ade223032287441763b7864f8185422fff9b0b5d43ca1201`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis found candidate code region(s). Indicators: SC_PEB_ACCESS
`objdata_02_off00077ec3.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x77EC3	56 bytes
SHA-256: `ca9cc3a88656e283b14abd7d75d80d89ed6fdba86032f6a6984e865b02662aee`

Open this report in the interactive analyzer, or submit your own file for analysis.