Malicious PDF — malware analysis report

Static analysis result for SHA-256 92fc74b031986697…

MALICIOUS

PDF

65.8 KB Created: 2020-04-01 15:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b70cd3d25f96dac7275dc4c42b8cdfb0 SHA-1: b2167865ff5f7d046c63043a5d4e39e7301b3d98 SHA-256: 92fc74b031986697fa953d2db1bb497185ca80c74b9e80c14d60e60e49c9f995
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to other PDF files hosted on similar domains. This pattern is indicative of a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. The primary URL identified is http://entrepreneursschoolhouse.com/uploads/1/3/1/4/131453294/131453294.html#teor%C3%ADa+del+conocimiento+definiciones, which likely serves as the initial lure.

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://entrepreneursschoolhouse.com/uploads/1/3/1/4/131453294/131453294.html#teor%C3%ADa+del+conocimiento+definiciones
    • http://micawbermind.com/uploads/1/3/0/5/130588502/3279666.pdf
    • http://cpgrecruiter.com/uploads/1/3/0/6/130639960/batijenijexoterem.pdf
    • http://2cc.tv/uploads/1/3/1/3/131379223/fowimevexinal.pdf
    • http://cbtforchronicpain.com/uploads/1/3/0/3/130323301/d4fe7.pdf
    • http://lauraolivertd.com/uploads/1/3/0/8/130874635/78ed2.pdf
    • http://firstdefensesecuritymn.com/uploads/1/3/0/4/130489023/pufudevivo.pdf
    • http://fairpath.org/uploads/1/3/0/6/130621649/1af0b82a.pdf
    • http://swingingtelegrams.com/uploads/1/3/0/3/130313826/zikokazelozajiluwozu.pdf
    • http://bauerhomemakerservices.com/uploads/1/3/0/2/130270872/d960df2a7.pdf
    • http://stubsforlove.com/uploads/1/3/0/7/130775123/4293952.pdf
    • http://plantshtx.com/uploads/1/3/0/5/130588779/1303965.pdf
    • http://simdeu.com/uploads/1/3/1/0/131070364/zutobufizeruwi.pdf
    • http://moncadas.net/uploads/1/3/0/4/130490193/zobobulupokizepobo.pdf
    • http://rakiurahelicopters.com/uploads/1/3/0/7/130739470/54f58b.pdf
    • http://salthousebooks.com/uploads/1/3/0/8/130874130/xawopuf-raren.pdf
    • http://orlandovacationplanning.com/uploads/1/3/0/9/130970015/33a8890dff.pdf
    • http://shedrums.net/uploads/1/3/0/6/130604499/wurodel.pdf
    • http://lasdamasonline.com/uploads/1/3/0/5/130588378/baxivoxujisejer.pdf
    • http://nampaartgallery.com/uploads/1/3/0/5/130590420/6473148.pdf
    • http://hurleyfirm.net/uploads/1/3/0/7/130739956/mokekupixevosatezan.pdf
    • http://mychinesesecret.com/uploads/1/3/1/4/131406427/6784410.pdf
    • http://queenpitbreeder.com/uploads/1/3/0/6/130621335/bbe501c8ae.pdf
    • http://aloha-sugar.com/uploads/1/3/0/6/130620616/buwezo.pdf
    • http://mydaisyschain.com/uploads/1/3/0/7/130739256/245fc70b56b.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_off0000d5e0.bin
248952fb13b9fca65d654ac0205df71742796d79448957f5e0bf434f1f672bab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E0 9244 bytes

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