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

Static analysis result for SHA-256 e33d01f16a90f74f…

MALICIOUS

Office (OLE) / .XLS

86.6 KB Created: 1996-12-17 01:32:42 Authoring application: Microsoft Excel
MD5: 12c889bb6d2ff54b1f6f1f7361fe15a6 SHA-1: 39e6c2fd1d32f287fcf5230805ed0143b6936795 SHA-256: e33d01f16a90f74fbf047fb00ffa86c3b44eca9a9d0874c099a098374af4800e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.003 Windows Command Shell

The sample exhibits a large slack space anomaly, indicative of potential obfuscation or embedded malicious content. A suspicious invocation of cmd.exe with an execution flag was detected, suggesting an attempt to run a command-line payload. The PEB access heuristic further supports the possibility of malicious code execution. While several URLs were extracted, most are confirmed benign; the remaining unknown URLs associated with 'pdf-repair.com' are treated as potential indicators.

Heuristics 4

  • PEB access via FS segment (x86) high SC_PEB_ACCESS
    PEB access via FS segment (x86)
  • Suspicious cmd.exe invocation with execution flag high SC_STR_CMD
    Suspicious cmd.exe invocation with execution flag
  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 88,638 bytes but its declared streams total only 24,565 bytes — 64,073 bytes (72%) live in unallocated sector slack. This is the canonical hiding place for pre-macro-era Office exploit payloads (XOR-encoded shellcode reached via a parser pointer-corruption bug in the document structure).
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.pdf-repair.com
    • http://www.pdf-repair.com)/Producer(Advanced
    • http://www.pdf-repair.com)/ModDate(D:20100406171120+08
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/

Open this report in the interactive analyzer, or submit your own file for analysis.