RTF malware analysis — malicious · 86e42a38553d05fb

MALICIOUS

RTF

773.8 KB Created: 2019-11-08 04:36:00 First seen: 2019-12-09

MD5: 9d085356c01a88d22e11da0704af937a SHA-1: af7072f9b5c819d0743c13115a2ea498ac28e47e SHA-256: 86e42a38553d05fb5094adf43d44ea0427fdb566050a7752abd344d6262e8156

222 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains multiple embedded OLE objects and triggers their activation using \objupdate, exploiting CVE-2017-8759. This technique is commonly used to execute arbitrary code or download and run a secondary payload. The presence of multiple OLE objects and the specific CVE exploit indicate a high likelihood of malicious intent.

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.
Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED

RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
\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.
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 5 \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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0001ef49.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x1EF49	51758 bytes
SHA-256: `443f39a53a03e398ae5044d85b54a2e88039e2c22328890c648d353b1edefd9d`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`objdata_01_off0003df12.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3DF12	51758 bytes
SHA-256: `06bdb4e4c90edc0cc5acb125ff56953d2b1f98721e3a225a8e4ae675df8cd760`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`objdata_02_off0005cedb.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x5CEDB	51758 bytes
SHA-256: `b9b3ae3d755539eb03b0c8f605780d9ec479f31b916cfd619bc6515e6ae03d2d`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`objdata_03_off0007bea4.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x7BEA4	51758 bytes
SHA-256: `6df8ec49d7373fd605091f49c6bbc9699c83fa932735c94c4f0af21c7a395f64`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`objdata_04_off0009ae6d.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x9AE6D	51758 bytes
SHA-256: `531b0ffc81a2202980df6e3ed7fb1db0661a46c14e97c931d2421909fb8fe6c1`
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.