Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca71d7ae618d41c9…

MALICIOUS

PDF

46.8 KB Created: 2020-04-11 01:10:52 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b7075b75dd800183233c082dacb17cef SHA-1: e17714afe1c14c3ef123b00b4b5b79b7fca83591 SHA-256: ca71d7ae618d41c9b9de9fe14d3c86816bd3e3b85b697d2e0dd6c09092acb885
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by a machine learning classifier with high confidence. It contains a heuristic firing indicating a large number of external links, suggesting a link farm or SEO poisoning tactic. The document body is heavily obfuscated, but the presence of numerous unknown URLs points towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://damiandineen.com/uploads/1/3/0/7/130775755/130775755.html#fundamentos+de+dise%C3%B1o+wucius+wong
    • http://epgoutdoorsllc.net/uploads/1/3/0/5/130551187/3845321.pdf
    • http://sicvita.com/uploads/1/3/0/4/130489342/zeputoledoju.pdf
    • http://mindmakeoverprogram.com/uploads/1/3/0/9/130969838/gevasado.pdf
    • http://earlsdonstudenthomes.com/uploads/1/3/0/6/130639679/sarilo-zubajeletu.pdf
    • http://simrananand.com/uploads/1/3/1/3/131379724/jafuxavuj-gubokogaxodib-godifave.pdf
    • http://theriotmobiledetailing.net/uploads/1/3/0/6/130639709/bokunew.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076f8.bin
9911beca812916b4887683d8f831f032c56d12e37f1d8ec14e972964293b6daa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F8 9200 bytes
font_01_sfnt_off00009842.bin
fc0bcc9d08d908b8b1287d0ab2df4e3a5be78b1d1690d8efe3ff9d2c54ab5679		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9842 16064 bytes

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