RTF malware analysis — malicious · 1d510dd89581fee0

MALICIOUS

RTF

1.34 MB Created: 2017-04-28 20:47:00 First seen: 2019-03-10

MD5: 7d664485c53b98180e6f3c69e9dfa81e SHA-1: d4a8c1d6aae6e664fe2b9d2f67b52ce5c621ce9e SHA-256: 1d510dd89581fee017c8e6ee0a3c8c6c4694d12d89b2c11b601c2811f38af759

362 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is an RTF document that exploits CVE-2017-8759, a critical vulnerability in MSXML SAX OLE activation, to execute arbitrary code. It also contains references to PowerShell and Windows Script Host, suggesting further malicious activity. The presence of OLE object data and a 'Password-protected archive handoff' heuristic indicates the document is likely a lure to trick users into opening a password-protected archive, possibly containing a phishing form or further malware.

Heuristics 10

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: Win.Phishing.Suspicious-6355521-4 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Phishing.Suspicious-6355521-4
Reference to PowerShell high SC_STR_POWERSHELL

Reference to PowerShell
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
Package object class high RTF_OBJCLASS_PACKAGE

OLE Package object — can wrap arbitrary files
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0013c244.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x13C244	11432 bytes
SHA-256: `31574f5bdb8bcc923d429aca60ecb6ebb8c734efa99cc3937ce6a7e04ba673d4`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis recovered command string(s): mshta.exe

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