Malicious Office (OLE) / .XLS — malware analysis report

Static analysis result for SHA-256 8cc74ecc44e66ffb…

MALICIOUS

Office (OLE) / .XLS

1.03 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: afb63da476abcd95fe5f963418f8691e SHA-1: 9339a85801ba8d3cc44c2999fbd22ffbefe6dd3b SHA-256: 8cc74ecc44e66ffb5ddd8d696e3392213bb5abfd654272294541e3b1a00145cc
100 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell T1105 Ingress Tool Transfer

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object, which is designed to load remote content. The associated URL, https://wrath.me/qT72E4, is highly suspicious and likely serves as the initial download source for a secondary payload. The presence of a polyglot PDF further suggests a multi-stage attack, common in downloader malware.

Heuristics 2

  • OLE2Link / URL Moniker → remote loader — CVE-2017-0199 critical CVE likely CVE_2017_0199
    Document contains an embedded OLE link object whose URL Moniker points to a remote URL. When the host file is opened, Office follows the link, downloads the URL, and processes the response based on its Content-Type (HTA -> mshta.exe, RTF → Word, etc.) — the documented CVE-2017-0199 primitive. The URL extension is not a reliable filter; servers can return different payloads to Office's user agent.
  • Secondary embedded PDF body has suspicious static findings high POLYGLOT_CHILD_PDF_STATIC_TRIAGE
    A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
polyglot_child_pdf_off00099000.pdf
c14f06590f1057b6d1efec0c68a13999a7b4efb7667117fc5728f72445562d9d
polyglot-child-pdf Secondary PDF body inside ole container at offset 0x99000 458240 bytes