Malicious PDF — malware analysis report

Static analysis result for SHA-256 52509b57d6f518b9…

MALICIOUS

PDF

106.9 KB Created: 2021-09-01 12:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f74f7659d83101376114a72ca7d308a1 SHA-1: ccb329d97634b99c727fa14de8acac7fc24f7085 SHA-256: 52509b57d6f518b936fb32ee1baad707147640f3ccc6304ebeb41e21ddca3458
154 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple external URIs and a link farm heuristic suggests the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9009

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://senseoftourism.dk/userfiles/file/60292212681.pdf In PDF document text
    • https://posh.hr/files/sifusojitifolanuduluwimo.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/75227698705.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/laxifil.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/97040883184.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/7390de4b4353d3b4aa3167f11064d1b9/73092973799.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/mujekotemu.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/kcvciub1kpbl5d4607sta56t42/nurogotetigi.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607627ed35d0f---13901452421.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/jilupu.pdfIn PDF document text
    • https://gmt-tw.com/app/webroot/userfiles/files/watifowuvume.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/28975bc6495739ae749885f42b562c6b/42198282399.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/6b73ade1eb559d20bc4ec3a8bc9f83d1/latiku.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93f963523c---76420038732.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/sajetiredelimopalakirap.pdfIn PDF document text
    • http://abakus-routing.co.uk/ckfinder/userfiles/files/7565778426.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d0a291092---pexit.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/3bf31ee49008dcc988f3ec18a97b6593/pogedixamojowilunas.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/9d85a941cf2c30909018dc8e2b54286c/xugudo.pdfIn PDF document text
    • http://ankaraeksioglu.com/resimler/files/rijabegalasamewov.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160902cb668042---navemu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf94218d1a---45296729730.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f3b90b6fc7c---74536978116.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/75801557469.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=wesley+randall+fed+up+nowPDF link annotation

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