RTF malware analysis — malicious · b8d9c3147c410831

MALICIOUS

RTF

1.22 MB Created: 2019-09-17 13:59:00 First seen: 2020-06-01

MD5: 7b2cd9a739d98f082eb8a15fa81efade SHA-1: e57571a29902bf6341a54babd1bcf981075d8c4b SHA-256: b8d9c3147c410831fef2e0e7eec05df2fadfa2b780d5dbea159d6d642b8e43c4

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 update automatically, triggering an exploit for CVE-2017-8759. This exploit is known to facilitate the execution of arbitrary code, likely to download and run a second-stage payload. The presence of shellcode API strings in a static triage of the embedded object further supports this conclusion.

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_off0012ba00.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x12BA00	1349 bytes
SHA-256: `776d48fb9d7d84d30338f8c9c7e21f79917d43ab092b8e0b25813dd095ecbed9`
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.