RTF malware analysis — malicious · 85988bd3c24aa128

MALICIOUS

RTF

1.46 MB Authoring application: Msftedit 5.41.15.1515

MD5: 74895c9a3358be00548ca668580a1864 SHA-1: 15b4fdd61bb7c9f2ebce799b264031eda768cb25 SHA-256: 85988bd3c24aa1283a3ebf9aa543912a7d9fdbd32a3a0799fa0d494b056b589c

222 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The RTF file contains a large amount of hex-encoded data within an OLE object, which is highly suspicious and likely hides a payload. The presence of a PE header within this hex data further indicates an embedded executable. The document body's text suggests a social engineering lure to trick the user into interacting with the embedded object.

Heuristics 7

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.
PE header (with DOS stub) in hex data critical RTF_MZ_HEX

Hex-encoded PE (MZ + DOS stub) found inside RTF — likely an embedded executable payload
Package object class high RTF_OBJCLASS_PACKAGE

OLE Package object — can wrap arbitrary files
Large hex data blocks in OLE object high RTF_EXCESSIVE_HEX

RTF contains ~1526KB of hex-encoded data inside \objdata sections — may hide a payload
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 info 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off000000d1.bin` `52b19dd5600662fe4666eafe918d10b1a24ea023cf535adf6bcd147f1fc5c7f4`	rtf-objdata-decoded	RTF \objdata at offset 0xD1	744384 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.75, consistent with packed or encrypted content.

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