RTF / .DOC malware analysis — malicious · e71f7afb3e286d3d

MALICIOUS

RTF / .DOC

345.0 KB

MD5: 7ef9714fc4a26f70b8a10bf1bd5f3ac3 SHA-1: 90356d66743e4c81429bbec5b116fd98e4e0dfd0 SHA-256: e71f7afb3e286d3d634dd2b9a6b4346e2e35964953181c9f7340bed7440556d9

140 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF document contains multiple OLE objects, with specific heuristics indicating the use of \objdata and \objupdate to trigger OLE activation. This suggests the document is designed to exploit vulnerabilities related to OLE object handling, likely leading to the execution of embedded malicious code. No scripts were extracted, but the presence of embedded OLE objects points to a delivery mechanism for a secondary payload.

Heuristics 5

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.
OLE object data medium RTF_OBJDATA

RTF contains 3 \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.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off000007ce.bin` `30c30a2835101fa3bce2308b0ccc540c1d52baeee5c1e31c20f843f0b15dd1a1`	rtf-objdata-decoded	RTF \objdata at offset 0x7CE	78465 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`objdata_01_off000285f1.bin` `ad7bf1923f855fca5949d0c557a2a819b106cd84b204870bcc59064eb0c6e331`	rtf-objdata-decoded	RTF \objdata at offset 0x285F1	2632 bytes
`objdata_02_off00029b94.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x29B94	12297 bytes

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