Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd6b9d7abbc1e3f…

MALICIOUS

PDF

73.4 KB Created: 2021-08-16 04:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 01f75db877fe12c5745534449df571b5 SHA-1: 4fbffda8b0e9a97bbff36a1041e0ebcbc5bcfc7c SHA-256: 5fd6b9d7abbc1e3f86618ed1ca04814416f726429ff4a90380122a4e36e190d5
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains embedded JavaScript and presents a link farm pointing to multiple distinct hosts, many of which are compromised WordPress upload directories or disposable hosting. The embedded JavaScript likely facilitates the redirection or execution of malicious content from these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9298

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://www.algeos.com/js/ckfinder/userfiles/files/nododeselofowagemafamixi.pdf
    • http://aarogyamedico.com/userfiles/file/71344783.pdf
    • http://mgocsm.in/userfiles/file/refesarafuxaturevugab.pdf
    • http://revize-elektro.info/UserFiles/File/veroxivepadijidimeri.pdf
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/03cae4505339bc466ae44740c9d82057/lolebuwakuzodizi.pdf
    • http://majorpropertygroup.com/userfiles/files/23667160921.pdf
    • http://minerva-collection.net/files/files/77137865507.pdf
    • http://singer-island-condos.com/userfiles/files/gukosax.pdf
    • https://krassimirtaskov.com/userfiles/files/35159510746.pdf
    • http://akcjonariusz.com/UserFiles/file/ramir.pdf
    • http://abwingsbuffalo.com/uploads/files/16783051866.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e06b5288c---42276767123.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872a92ddfad---91395476770.pdf
    • http://kokomo1986.com/clients/31029/File/nukuraz.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/d0018453eacb04204407869b20eed63d/kosixanolofaduf.pdf
    • http://lnshiyue.com/userfiles/file/20210530053549_790531603.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/80semdingeoce8b5r1ikhpv58d/janabemidub.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/24a1980c896395d581cd80c38ac8fbec/54242014910.pdf
    • https://maydangson.com/vietkiendo/upload/file/rejiwodufizisufo.pdf
    • http://giaoducvietnamtv.com/images/ckeditor/files/55200874178.pdf
    • http://drironcat.com/images/file/sojutesuletukup.pdf
    • http://andlupa.com/userfiles/file/36227798387.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609759144ef39---bizamazagalipazixer.pdf
    • https://comobrew.com/newsite/images/user_uploads/file/14953478287.pdf
    • http://baldonimarcostudio.eu/userfiles/files/33766910287.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+many+active+players+does+diablo+3+have

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