Malicious PDF — malware analysis report

Static analysis result for SHA-256 354b3a7eca89dbee…

MALICIOUS

PDF

57.6 KB Created: 2021-09-14 05:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 9783318ab52d79dcfb7b9c8ac677130e SHA-1: 51e29cdfd134b67d820746f4bf1c24c09a17dfbd SHA-256: 354b3a7eca89dbeeb1c5bd86d9c942fb7d2f9bdd78fa7c94c141f7882330ae0f
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several pointing to compromised WordPress upload directories, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The ML classifier also flagged the PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5305

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
  • 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.
  • 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://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/atl09h52olpficcvb6l6vgmu21/kuxanaruremurunujiwi.pdf In PDF document text
    • https://pharma-tools.eu/galeria/file/wadisi.pdfIn PDF document text
    • http://klubbelgickychobrov.sk/editor_uploads/files/26896996868.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/6598237582.pdfIn PDF document text
    • http://brandorbit.in/userfiles/file/boxopubufewopumorinolaluf.pdfIn PDF document text
    • http://effekt-film.de/files/file/jelaxuxef.pdfIn PDF document text
    • http://redskap.ru/userfiles/file/wodigutijomanolozem.pdfIn PDF document text
    • https://ourlady-schools2.com/userfiles/files/kiliw.pdfIn PDF document text
    • http://araonline.hu/uploads/file/55910312491.pdfIn PDF document text
    • https://sreekanakananda.com/ckfinder/userfiles/files/bosavegimilebifoxo.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376c846513c---jovisisixojeguditow.pdfIn PDF document text
    • https://www.gurgy.net/ckfinder/userfiles/files/81202515541.pdfIn PDF document text
    • http://idevicesplus.nl/app/webroot/files/userfiles/files/toleribazezosifovejox.pdfIn PDF document text
    • https://armenia4d.com/contents/files/jexopotefugiko.pdfIn PDF document text
    • http://sabancilojistik.com/userfiles/file/guxowoda.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/77419978892.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/bedoxebarupowezijudulomup.pdfIn PDF document text
    • https://viboot.traigiongthuha.com/ckfinder/userfiles/files/21144010051.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16134bce80090f---setoralebimadox.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/gimebomozulifuvewewoli.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e120d50696---xolugevososit.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/20045765901.pdfIn PDF document text
    • http://revucue.com/ckfinder/userfiles/files/kiwogokududifezesubogem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=tube+video+apk+downloadPDF link annotation

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