Malicious PDF — malware analysis report

Static analysis result for SHA-256 b908b0e20552e35e…

MALICIOUS

PDF

54.0 KB Created: 2021-08-29 07:29:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 40049b7db8755e7d09d7d450e0ea3f21 SHA-1: 149574d5e6eb315cf5408f1a3c1997461736dbec SHA-256: b908b0e20552e35eca43a877f6003801774a8553e4cd0cd5720442f0d7ac72f9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS uploads or disposable hosting. These links are likely intended to redirect users to phishing sites or download further malicious content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7621

Heuristics 5

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medvor.ru/uplcv?utm_term=pdf+file+into+word+document PDF link annotation
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zevaxamugakaz.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7273d83013---16628357785.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/fusisunotipupafagetalet.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/s5gu8nk98o4bn6s9c78lbsipq1/vomelov.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e228fe3698---10256621326.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/41476562944.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/27198799315.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/mkjiicelm8q80pvcmh59oh9nif/88333938416.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/39986874986.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/mefejimilesodofenuke.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/e95973239d218272be22a8588bc0f55c/takotipajesuwiguv.pdfIn PDF document text
    • https://aglogistics-bo.net/userfiles/file/duzabigigunive.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/a7c6933530957bf763aefb8c6e8764dc/tinoda.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/tqs4kd1vscb09ms5d4g9vbnstv/65090240955.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/1psgempkk7hei1jkuofcpnp63a/tekuzowexawuromuvoralo.pdfIn PDF document text
    • http://sushi-belovo.ru/files/xedoxosojepegolasek.pdfIn PDF document text
    • https://cvzona.lt/resources/img/files/70526597854.pdfIn PDF document text
    • https://mangalargalux.com.br/ckfinder/userfiles/files/92644334648.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/9622650c29aff671bef51a4aef9b104d/13338867561.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/gesotevalizufinomugiliwef.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ba88ad28d2e---64602467371.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/53617963252.pdfIn PDF document text
    • https://orangerun.re/photo/files/16696178841.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/80950198672.pdfIn PDF document text
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/41268156510.pdfIn PDF document text
    • http://hbleg.com/admin/userfiles/files/bobixabunomikewezoget.pdfIn PDF document text

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