RTF malware analysis — malicious · fb1a601314b1c661

MALICIOUS

RTF

322.1 KB Created: 2019-09-17 13:59:00 First seen: 2020-08-25

MD5: 573abeb37d417f8d1a9de6120812ac95 SHA-1: 481172c7b7e3c969881a9cbe3cce88bd899875cc SHA-256: fb1a601314b1c6613e10ebf2941338bf9eeb7fd1a6e4f75d59c5fa4dd3d0b4f7

162 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains an embedded OLE object that is configured to automatically update and activate, leveraging the CVE-2017-8759 vulnerability. This indicates an attempt to execute arbitrary code upon opening the document. The presence of shellcode API strings in a statically extracted artifact further supports this. No specific malware family could be identified.

Heuristics 6

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.
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 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/2003/wordml In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00049e56.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x49E56	1351 bytes
SHA-256: `b542f2ed05f009c4885dfd2217e176d688dafc83726e8440f1f88fd648b0f91d`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis found candidate code region(s). Indicators: SC_STR_LOADLIBRARY, SC_STR_URLDOWNLOAD, SC_PEB_ACCESS Static shellcode analysis recovered API/import strings: LoadLibraryW, GetProcAddress, URLDownloadToFileW, ExitProcess

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