RTF malware analysis — malicious · a8fa4c806d97e59d

MALICIOUS

RTF

537.3 KB First seen: 2018-03-24

MD5: 58e3de0352abeacb25e65657e6cb3d1a SHA-1: c8c547e8565fafdd7f76974d2533e2282a1bf52a SHA-256: a8fa4c806d97e59db0c42b574558a68942eadfe56286a66d90a8f6248a34cf43

162 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is an RTF document identified by ClamAV as exploiting CVE-2015-1641. This vulnerability allows for arbitrary code execution when the document is opened. The presence of OLE object data further supports the exploitation of embedded objects within the RTF structure. The primary attack vector is likely spearphishing, with the exploit serving as the initial execution mechanism.

Heuristics 4

ClamAV: Doc.Exploit.CVE_2015_1641-6397417-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Exploit.CVE_2015_1641-6397417-0
OLE object data medium RTF_OBJDATA

RTF contains 2 \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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000050.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x50	2614 bytes
SHA-256: `b01dfdae19e9ef6da564d7f496bad0c7d655878df443f8d01890b7a3539239a0`
`objdata_01_off000034ad.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x34AD	50225 bytes
SHA-256: `cbe3bf3b20c3d8097ae152f6307a193f20226ed8984281d958f6a421b94d88e1`
Detection ClamAV: Doc.Exploit.CVE_2015_1641-6397417-0 Obfuscation or payload: likely Carved artifact entropy is 7.85, consistent with packed or encrypted content.

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