Malicious PDF — malware analysis report

Static analysis result for SHA-256 e358ff5d54ae6b57…

MALICIOUS

PDF

64.0 KB Created: 2021-08-02 05:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f9e13056a780436ec32f850cfb0e35a6 SHA-1: 49325155325f75878d12a0542f248ac4bce79834 SHA-256: e358ff5d54ae6b57042a8b541138118d8a4ee4e70ef359b637ad516284a63435
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised websites and disposable hosting, which is a common tactic for phishing or distributing further malware. The PDF structure and embedded links suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9826

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://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbd3e18866---73000684405.pdf In PDF document text
    • http://zonwering-nederland.eu/ckfinder/userfiles/files/luzab.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d2f16b2fe---pedogijimakexuriwibilo.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/raxoditemerevobizoga.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/73ebaaffdb214a53eaa81e685e1ed01a/zesozivazofezosos.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/91360487060.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609496b557de2---42122452035.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/gored.pdfIn PDF document text
    • https://solener.info/ckfinder/userfiles/files/30643388842.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/de90af2346af618b9c5b78ef297e561d/58761083598.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/a47c75a3787c511e2897c94c73d31980/58816047858.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a96ec5818b---bodanokopa.pdfIn PDF document text
    • http://splogservice.ru/content/file/78770783857.pdfIn PDF document text
    • http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/letof.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/90308132240.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/sexudirub.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/rivup.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/pkbss0qlj6b6a5u7ei2mdgaulm/xodomosipajitapijokuvuvo.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/15400660573.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/19963398549.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///gosogoxavurimuju.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021062609302184.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b98c85e413---gunopeboba.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/womigiwudiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=what+is+correlational+research+according+to+authorsPDF link annotation

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