Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ba1010112cd121…

MALICIOUS

PDF

64.0 KB Created: 2021-07-28 06:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: d8bb7478d36aa314832d69814841c44e SHA-1: ef437537a752fe9fed50b8ad3c6adb305585fa95 SHA-256: f7ba1010112cd12156952813bb5bf127269018bba5ee403cdd65905779b36ee5
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised websites and link farms, suggesting an attempt to distribute further malicious content or conduct phishing. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a deliberate effort to obscure the final destination of these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9770

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1717c2a87e---88824968318.pdf In PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/62e451d846db1c7ce919e323d99b7cee/lelibagavisuligapig.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42e0f53119---19901405544.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/90763036961.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ffc687a3f---wibeponinodasaziwelupos.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090258229ab5---jijepopagaz.pdfIn PDF document text
    • http://pechati-piter.ru/userfiles/file/15587016746.pdfIn PDF document text
    • http://majesticcaliberenglishlabradors.com/clients/a/a7/a77fae3751d16767b5fd1969bdae34dd/File/gafuvarizirodopalitune.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/tuzobepivavoborasuzo.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/c2ih1rufpuaioju7q3pdfrc8md/pawelutebi.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/xupupuvunilexuve.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/98b956e9373fd9e4a1f4705e900cac91/96842438420.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a34599af1ba---24934789271.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e00eba4bb0---31759617406.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/34044448999.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/1288368727.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/82423460830.pdfIn PDF document text
    • http://otohondamientay.com/upload/files/zejoxavakavuzoweta.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/93905463865.pdfIn PDF document text
    • http://dongzzang.com/userfiles/file///54149497474.pdfIn PDF document text
    • http://4yoga.by/pics/files/83191111312.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///julofanapiw.pdfIn PDF document text
    • http://sanders-scottfamily.com/clients/26926/File/latukanilatoruzada.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=ron+burgundy+jazz+flute+sheet+musicPDF link annotation

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