Malicious PDF — malware analysis report

Static analysis result for SHA-256 c572acba76cabdee…

MALICIOUS

PDF

63.7 KB Created: 2021-08-20 22:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ea1ed023435dd38c8cb1b562a294ef65 SHA-1: 85ecbe5134101f97c3009654feb97a6bc73303b6 SHA-256: c572acba76cabdee28dda284e0ff32e0254253b9db4868af10c4a58a47bfe5ab
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is unreadable, but the heuristics and URLs clearly show the pattern of directing users to potentially malicious content hosted on compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9857

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 https://galedo.cz/www/data/cms_files/files/ditevavodebo.pdf In PDF document text
    • http://freeski.hu/freeski/file/84772809660.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160a637bb43604---21609711168.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/uuhqk01ho1ij5i3ss2ckbeeot3/zopaduwanalemodasupovo.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083eb78d4001---fopezavizu.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/vj6l71e6g160u0qc024vng8iph/rumuvofolikapeka.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e3328a550---xuvepesor.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/379fe1b64843d740febbf1b6d2629446/mevesisazapedilemelod.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/nikugezirelimirebe.pdfIn PDF document text
    • https://sharpconsulting.us/app/webroot/ckfinder/userfiles/files/xexekuferurojadewanudaduz.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/if7vmrai8p7bob3qhlb3nsak8p/76692701475.pdfIn PDF document text
    • http://tatishev.ru/admin/ckfinder/userfiles/files/fuvopekovixarom.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/72k06dso3lqk94cvdqgbofs4k7/59125976416.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/27a65d6428a9c8869af07ab948f765f0/4824210752.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16097966dd4f2d---66253807034.pdfIn PDF document text
    • http://refah4ter.info/basefile/hotelrefah4terir/files/zinenubo.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/17r95bbog30005garqe56au354/54292168521.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/mokoxivemizubebejaxi.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834ffe34cb9---bozotavupo.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/7d99ac36ccd031e4ec8260938cc14047/zorobogulujenuno.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/07da6cb899452a59bd1c3325296ce047/6350052243.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=what+are+the+rules+of+email+etiquettePDF link annotation

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