Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de4cfbfd612b4b7…

MALICIOUS

PDF

95.7 KB Created: 2021-09-03 06:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: ba5cec24b09caf3d48e8c4618a70fe08 SHA-1: ac695c90846a4c2e71cdf3cd3016d08aba8d6322 SHA-256: 5de4cfbfd612b4b7c8afb5cdfe7a3209c7d7b563a2a66379beef4ea520f2461f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this. No scripts were extracted, but the overall structure points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6771

Heuristics 5

  • 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 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://crysiq.ru/uplcv?utm_term=hypnose+pratique+en+11+le%C3%A7ons+pdf PDF link annotation
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/bdef7878c370d582120dc3a29d2ec97f/58931603636.pdfIn PDF document text
    • http://pvhs1980reunion.com/clients/e/e5/e5e9f74eb83211af097e98bf68d59c4c/File/baforixokiruti.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/13618557845.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/32f95eedc4aead3ea03499b305a0a475/35289880531.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/bibinupirupimonowifo.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606fae3104fbf---goneroxizale.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/dhamfeio3o9fr483dkes1fc6ge/dumumi.pdfIn PDF document text
    • http://scantech3d.com/files/42267900902.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/30982804191.pdfIn PDF document text
    • http://sankofalectureseries.com/clients/a/ae/ae3037074ff26ae8502dacd236f4ced8/File/869562180.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160780b5c97f8f---71641832440.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16078975d23482---16048965708.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/15686795311.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/0ic4n6lvp189clv44o3b9rornb/fesasakofotibujutasa.pdfIn PDF document text
    • https://noventa.cz/media/files/file/82484266642.pdfIn PDF document text
    • http://ithaca1962.com/clients/41687/File/50318278305.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/gemojibekurif.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/fedez.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/95723105608.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/56091888915.pdfIn PDF document text
    • https://thebottombillion.org/business_school/uploads/file/18666581087.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021073012551053.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/rafemobofi.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083955fd30ca---12729305595.pdfIn PDF document text
    • https://x-software.cz/data/file/ferapegadapavod.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/i5ig3r4oligcebaom1ph0qh9q3/bazizujokewepu.pdfIn PDF document text

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