RTF / .DOC malware analysis — malicious · 32a024103510d3bc

MALICIOUS

RTF / .DOC

310.4 KB

MD5: 5315a08422086cda999763363ac021e1 SHA-1: 13f01dc21a7158b6df60db85ebb5d35474893cc8 SHA-256: 32a024103510d3bc6bc15416a226a930aed25abd4bc7764ef2f672b88acf3b69

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF file contains an embedded OLE object with a suspicious Equation Editor ProgID, indicating an exploit attempt. The ".objupdate" directive suggests that the OLE object is automatically activated upon opening, which is a common technique for exploiting vulnerabilities like CVE-2017-11882. The extracted artifact, objdata_00_off00001097.bin, is likely the second-stage payload. No specific family could be identified, but the attack pattern is consistent with exploit-laced documents.

Heuristics 4

Split hex Equation Editor ProgID + OLE object critical RTF_EQUATION_EDITOR

RTF embeds the Equation.3 ProgID as hex bytes near OLE object activation and splits the byte stream with whitespace or an ignorable RTF group. This is an Equation Editor OLE activation surface commonly used by CVE-2017-11882 / CVE-2018-0802 exploit documents.
\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
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_off00001097.bin` `9ac1e2fdd2f2714bdfb3b72d45f21925352dda39841ee0d9777284e1c547ccaa`	rtf-objdata-decoded	RTF \objdata at offset 0x1097	156716 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 8.00, consistent with packed or encrypted content.

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