Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3815f6250f235ef…

MALICIOUS

PDF

63.6 KB Created: 2021-09-07 06:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 13be267797569b6a47336570ca8eb162 SHA-1: 5cdb438a66fc2343cd4c505365f5311fd61dc610 SHA-256: f3815f6250f235ef95d722f50170be6cba5da7041eb1e0cfc1d35fd27819b6f8
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for delivering malicious content. The heuristics indicate that the PDF acts as a link farm, directing users to compromised websites and potentially disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6403

Heuristics 6

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=copd+fatigue+scale+pdf PDF link annotation
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/5vj1d2f3jbn8vnh522vcqa5np1/52785874142.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/ckh138pro7mderkp0nm1u9vgl5/xutonazavudavukedinadoti.pdfIn PDF document text
    • http://alpinedelhi.com/userfiles/files/gitujitoxesulatifuwakome.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160942dd2d3b0d---69617560093.pdfIn PDF document text
    • http://innobiztour.com/FileData/ckfinder/files/20210703_7974BA6656B500E2.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a055f24c922---gilobezoxu.pdfIn PDF document text
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/loxokobuvumerag.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/28b63bfa48371d965391d3f1b9e51443/laxemepunubadi.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab45d492ddd---25275322513.pdfIn PDF document text
    • http://peaktoppet.com/ck_imgs/files/1031247396.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc40e8602e---zabefobusafuzawusena.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/60925938311.pdfIn PDF document text
    • https://susta.vn/userfiles/file/63448234386.pdfIn PDF document text
    • https://carlojans.com/cms/file/gunenaf.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c06c51b6636---xozelagepumipuxuriwo.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd385dd169b---10230512487.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/30739459948.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/a3f3c0cc334f87b86458452773a82593/79557764039.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/20236457726.pdfIn PDF document text
    • https://maintogelonline.info/contents/files/tarubotekedofezetiwuxasi.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/491228d91077b32656b96c729e046fac/37775792182.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/7aka9edn3uncsprpkka9scdd64/72324616876.pdfIn PDF document text
    • http://tomei4x4.jp/js/upload/files/zozegasakadijilupetam.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/e2a5d89bf6004c4e52d175e08d92d220/jikufewizipobukatuboma.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/aago8bk4nspsddb4360qodhjsr/55113535689.pdfIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

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