Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e1d38b74ce6731…

MALICIOUS

PDF

52.5 KB Created: 2021-09-26 21:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 510c3af5ef91c994bd47618dd81be21d SHA-1: 112393826a85481d50821645b0380d31eab4fb55 SHA-256: 63e1d38b74ce6731baff1d00f6898d0135ca0fa6264afb1ddb6fc04e60f8576c
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is part of a link farm, suggesting it's used to distribute or redirect to malicious sites. ClamAV also detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6720

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
  • 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://cosonnguyenthanh.vn/webroot/userfiles/files/saloni.pdf In PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/37572052774.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/gelubegafosawoti.pdfIn PDF document text
    • https://printsolutions.printsolutions.bg/uploads/wysiwyg/files/fixoko.pdfIn PDF document text
    • http://elliptical-trainers.ru/ckfinder/userfiles/files/fapowiw.pdfIn PDF document text
    • http://edins.net/userData/ebizro_board/file/loxiruwajawa.pdfIn PDF document text
    • http://marymo.ru/uploads/files/8122148598.pdfIn PDF document text
    • http://quimicahj.com/admin/userfiles/userfiles/file/34298340343.pdfIn PDF document text
    • http://15441707.com/data/board/file/20210917160118.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1631686427koxaxa.pdfIn PDF document text
    • http://www.iciparis.ru/ckfinder/userfiles/files/kezutekupiginatezak.pdfIn PDF document text
    • https://we-plus.tw/ckfinder/userfiles/files/juruduja.pdfIn PDF document text
    • https://doitoutdoorz.com/file/c6eJArCrjCtVbQaf.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/6d59e83edae9f9b00c1d570b7c23265e/danitesaduniwo.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/11730652919.pdfIn PDF document text
    • http://capthepcongtrinh.com/uploads/news/files/40323570932.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/vilexowivujowubulujimu.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/genigipirapa.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/kopedisakaxawazamukokelen.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/41082639906.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/78358242050.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/fejujagikinodevunusuro.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/161303381e81a6---fedikojimebobopad.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/57228618917.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=most+downloaded+app+from+play+storePDF link annotation

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