RTF malware analysis — malicious · d608fa39e6521f7c

MALICIOUS

RTF

1.00 MB Created: 2019-07-30 First seen: 2020-02-04

MD5: 25365593f6f129c62d8d308fd3e38082 SHA-1: 8a89c1e0c95a669a70a816d255a5740790f0a679 SHA-256: d608fa39e6521f7ccf8284113b605d0fc0c753dda67c0433e03f2674835fd0ed

222 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains embedded OLE objects with excessive hex-encoded data, and a critical heuristic indicates exploitation of CVE-2017-8759. This suggests the file is designed to exploit this vulnerability to execute arbitrary code, likely by downloading and running a second-stage payload.

Heuristics 7

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.
\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.
Large hex data blocks in OLE object high RTF_EXCESSIVE_HEX

RTF contains ~1003KB of hex-encoded data inside \objdata sections — may hide a payload
Suspicious extracted artifact high 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.
OLE object data medium RTF_OBJDATA

RTF contains 2 \objdata section(s) — embedded OLE objects
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object
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/2003/wordml In RTF body

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off000028ef.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x28EF	238638 bytes
SHA-256: `dde417550b4bdc0752536bd99bf0938332d5caf674f2f161f8ac9d4b96420bdd`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`objdata_01_off0007d84c.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x7D84C	238638 bytes
SHA-256: `2de272153f1d9e74e5f79ab098027365939cb407e0b9408ee293f09487848498`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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