Malicious PDF — malware analysis report

Static analysis result for SHA-256 591603e29a507399…

MALICIOUS

PDF

41.6 KB Created: 2020-04-29 06:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ad39f607f02bb0dd7012c220fae5da00 SHA-1: 0fad57efd246d7336dde5169a279e6f148c85116 SHA-256: 591603e29a507399473e79888165b258a05133effa8cfd0fca26434e6d5f85b5
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files with numeric slugs, indicating a link farm designed for SEO manipulation. One prominent URL, 'http://buddingenterprisefund.com/uploads/1/3/1/4/131409037/131409037.html#descargar+clash+royale+hack+tool+android', suggests a lure for downloading a 'Clash Royale hack tool'. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a malicious distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://buddingenterprisefund.com/uploads/1/3/1/4/131409037/131409037.html#descargar+clash+royale+hack+tool+android
    • http://mun4all.org/uploads/1/3/0/8/130813306/gikuresufizutoma.pdf
    • http://rnjmusicandpoetry.com/uploads/1/3/1/4/131453087/darekunomalovinisi.pdf
    • http://epvtaservices.net/uploads/1/3/0/4/130478004/jaxanozowo_wabikuxur_wulelivupug_ridufuw.pdf
    • http://rob-write.com/uploads/1/3/1/4/131408849/bewemalez.pdf
    • http://love-pv.com/uploads/1/3/0/5/130588620/854cbc38010b3c5.pdf
    • http://kipjonproductions.com/uploads/1/3/0/5/130550672/7907958.pdf
    • http://insiot.org/uploads/1/3/1/0/131071035/c5707d7.pdf
    • http://troutjockey.com/uploads/1/3/1/4/131408159/ninixoradimezisuk.pdf
    • http://farrellforfourth.com/uploads/1/3/1/4/131406695/dinizini.pdf
    • http://doolittledesigning.com/uploads/1/3/0/5/130544694/d1d47166bc6fd6.pdf
    • http://forge-x.media/uploads/1/3/0/5/130551015/1d8ecf9ba.pdf
    • http://rocklifemusicacademy.com/uploads/1/3/0/2/130291635/jeleb.pdf
    • http://wallyworldfishing.net/uploads/1/3/1/0/131069838/6d3a0.pdf
    • http://altitudeexcavating.com/uploads/1/3/0/2/130288520/gaxakan.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077b3.bin
5c78fda58021bf46444769ea10a298b16fbbca61e7220c2de40e4a1fb889ae54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B3 9596 bytes

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