Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cbaaa2f178302d3…

MALICIOUS

PDF

107.1 KB Created: 2021-09-18 00:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f06880a8138ead5465bb08c60335f479 SHA-1: e6af697a62b655447eeb9bac6422ab6f62e72b59 SHA-256: 7cbaaa2f178302d396b39c66289387a81db8c0ad946eaa64dc9b063a597b2f4a
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript and numerous external URIs, suggesting it is designed to redirect users to potentially malicious websites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a high volume of links hosted on disposable domains, further supporting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8373

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://coretry.ru/uplcv?utm_term=read+tower+of+dawn+online+free
    • https://factorysales.com/userfiles/files/peluzekiwagokabolekosuti.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141668980450---japosuguxoseka.pdf
    • https://hzautomatisering.nl/userfiles/file/kexiberolatur.pdf
    • http://biolabsrl.org/userfiles/files/18990913941.pdf
    • http://ecohort.com/userfiles/files/xegetu.pdf
    • http://artattack-concerts.de/files/file/81817248039.pdf
    • http://citadelcaralarms.com/userfiles/file/82111942701.pdf
    • http://tomei4x4.jp/js/upload/files/96480506166.pdf
    • http://wabasnb.com/files/fckeditor/file/183507866161325260ae1eb.pdf
    • https://ruiguoex.com/upfile/files/2021/09/08/62341685565.pdf
    • https://pasifikendustriyel.com/userfiles/file/budaparuradopajonedev.pdf
    • http://studiopedrazzini.eu/userfiles/files/wuvaganiwepafil.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/f1ddf51ad9e239e2e1da49a32be3a1de/nelojurisi.pdf
    • http://to-kajihan.net/js/upload/files/zunaluwepovajeloripe.pdf
    • http://www.addvanceo.info/userfiles/files/zetusipo.pdf
    • http://vizit-k.net/uploads/editor/files/25793975494.pdf
    • http://dobrasekacka.cz/userfiles/file/17302806128.pdf
    • https://www.utn.ac.cr/sites/default/files/files/68880689793.pdf
    • http://travelci.ru/ckfinder/userfiles/files/5167169196.pdf
    • http://zenithmetals.com/files/katorog.pdf
    • https://www.highlandernepal.com/assets/ckfinder/userfiles/files/gepasiwowugelosizeg.pdf
    • https://georeno.ca/userfiles/files/20844013176.pdf
    • https://jnnjhansi.com/userfiles/file/71157458583.pdf

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