Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b5b42b5fbea36fe…

MALICIOUS

PDF

63.6 KB Created: 2021-07-31 01:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b654d7f7242cfe811481b8f32af50583 SHA-1: 48892f513c8507e60877cb95e8958ac439548c9f SHA-256: 2b5b42b5fbea36febf13fcbe49fcdf5ce3dacaef1e649a28c029b789b11fdb0d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to various websites, including those hosted on compromised CMS uploads and disposable domains, suggesting an intent to redirect users to potentially malicious content or phishing sites. No scripts were extracted from this sample, but the structure and URL distribution strongly indicate a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7982

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 https://honkakuji.jp/honkakuji/images/ckfinder/files/21486869388.pdf In PDF document text
    • http://silesiacapital.eu/data/file/zixopogaropulolire.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a19db906705---58577095335.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/c1e72aef94741ceda3af04d2966323aa/taroka.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/c613440448e52e946e2fccd7201a50df/bapaxitawenovo.pdfIn PDF document text
    • http://www.siposferenc.hu/html/9112082149.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/top8i3am4d5k01ej94vke7j5u7/tesumevibomolu.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/fusiwufilipifiwi.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/pawolifej.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e34adb8a30---bopevosudurosepejab.pdfIn PDF document text
    • https://aristi-trap.com/upload/users/files/3423777600.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090f602358f8---gaxepajusesinasegazeb.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2a54cb3c0---92578804083.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b64fe460af5---witunegulekesulob.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c104d23cf59---lobewetogemujugatuz.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/068550ec296405a0cd1d8b6f4ecc33c8/93399156004.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bde45d6ab3d---52922418583.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/puwasunolelujisi.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/ukkqa7cgs8tmp32sct6auuukdn/xanusudiwijunisomuxu.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/f4b3b0f5In PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=vikings+season+2+episode+4+reviewPDF link annotation

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