Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0235162a3d51eb1…

MALICIOUS

PDF

42.9 KB Created: 2021-09-06 03:34:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: e533b1e0c8901db391dd6859f0af4508 SHA-1: 2ef26f782187b4e70b7f6f5c8de60d28b362166a SHA-256: d0235162a3d51eb186d1474d5a6238f40125fe4858d6902bc647dd290375f1b3
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5388

Heuristics 5

  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 42 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://daonshop.com/files/fckeditor/file/lelevevuvadupadufav.pdf In PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ac543e3a1---75586954884.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/33802661114.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/9s8cg0och9o2dassd0b7nddfgd/vekepifonuwinadetovar.pdfIn PDF document text
    • https://8foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/fubanipidodevojapogopa.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/32036825113.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85ce53abc8---mojexanutam.pdfIn PDF document text
    • http://midel.me/userfiles/file/96142730672.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5f0d0c580---sasumuz.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613495084a0fe---67163833888.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607934f930db3---67350682847.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/jakilumuzeraxokex.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ec4112747---rujowikivisuvemunexogi.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/80110564084.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/el7hlnr2h1suptehcnrehacqre/24093839283.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2574a3a194---todesegog.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee8d278d0f---78380475632.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/wujen.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085035301ff6---77725876104.pdfIn PDF document text
    • https://diamond-marketing.cz/soubory/46642764193.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/finevoxeb.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/h1k18brti6mkm6vgd82luqv0oj/29372279922.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///xutirisutidegugudazaf.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16245826423152.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16124fc719a2ef---88025522157.pdfIn PDF document text
    • http://elma1.ru/!upload/files/74329153427.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/91409655946.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=sildenafil+bula+pdfPDF link annotation