Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa23bc0634f3c50…

MALICIOUS

PDF

69.3 KB Created: 2021-09-09 03:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3e29979a939ee646fb7a3810a2ff983a SHA-1: dd45f5c532c99b5471bc58c414c790dcfd208244 SHA-256: 8aa23bc0634f3c50e56bf940f8d1cc7d48882113315bc93a96b4a96178e8b0dc
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as a malicious PDF by ClamAV. It contains embedded JavaScript and a significant number of external URIs, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm designed to redirect users. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3264

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 http://hanmih.com/userfiles/file/20210902033319.pdf In PDF document text
    • http://castel.lu/userfiles/files/43278927246.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/48162402452.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/kowaz.pdfIn PDF document text
    • http://metapolar.hu/tmp/sawitakozerakufi.pdfIn PDF document text
    • http://amunt.madteam.net/ckfinder/userfiles/files/33529319249.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16132c3b7b3f05---senimejurazabored.pdfIn PDF document text
    • http://tuzy.pl/Upload/file/vulinevimo.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613132a856ef8---vuvodazipixejoweg.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/pedigabijugaxibe.pdfIn PDF document text
    • https://mekongtransport.com/upload/userfiles/files/83385714573.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/jufesoreti.pdfIn PDF document text
    • http://olymp-kiev.com/temp/fckeditor/file/32221944188.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/lasad.pdfIn PDF document text
    • https://cylinder96.ru/admin/ckfinder/userfiles/files/zovof.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/xolidinigeni.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///dofaruguvomuxoxexozup.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16138799c4a2b7---27694568102.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/foduwelakepixilikafa.pdfIn PDF document text
    • http://skia22.ru/pic/file/wafizepinerujajezu.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/34414939753.pdfIn PDF document text
    • http://orvositudasbazis.eu/images/upload/file/vuduxuxetimusixol.pdfIn PDF document text
    • https://tekstilkentrehber.com/upload/ckfinder/files/gedubudaxogepenulisobiker.pdfIn PDF document text
    • http://sspvjd.com/FileData/ckfinder/files/20210905_3D3E00F9C3C7864B.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0cb6956e1---tezugisub.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/kozozivu.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/ketoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=the+game+changers+planeatPDF link annotation

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