Malicious PDF — malware analysis report

Static analysis result for SHA-256 590ef43054975b18…

MALICIOUS

PDF

48.0 KB Created: 2021-06-28 18:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: eb5ae731503d928557008e47b54af9ef SHA-1: 53a8f8fe05315b43019f5dc8b87352d09396fc15 SHA-256: 590ef43054975b18b3c80c6601c9d05b53e6c17436016210789fefdd1258935c
154 Risk Score

Malware Insights

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

This PDF file contains a large number of links, many of which point to compromised WordPress sites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users to phishing pages or download further malware. The file's structure as a link farm suggests it's part of a broader campaign to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9298

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://huntic.ru/uplcv?utm_term=follow+up+on+letter+of+recommendation PDF link annotation
    • http://sehs67.com/clients/e/e0/e078d4d0076166a7bb489ca3b3a583ab/File/bofufiguxulepasaju.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb1bd436cf---40129682481.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/30259985659.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2ebf8162f---27936500467.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/93l293v3pnv770vhsk82svnr2n/58833407747.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/3cjsh0tog4vctlen75v6rd8u12/vologikepex.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/muhs71m2hiqkrb2mmgsi6cd9b2/41934239268.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/tubewaxokepekoduloriliku.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/i7ts1n68f0s97ouees2rh58pr2/jafupiverasowipajuzew.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/df979c813003bc633ddc537a8f3f45f4/dokiv.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/c0e2b4833527adfc1b8327bfb9663345/galaf.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/jonodaliwonibeful.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/wufubafot.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607060825fc4d---logulirowo.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/1cdc87d25f34ef2b9af7f38139853ce5/maxinufu.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/12226322512.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc8d88f253---nedavajuvipovigopotenix.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f1fe2029d---reromoxufanuxorumikaxude.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a422ca0464a---75831535452.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/13277454895.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080d36f4f984---nezabowugigitobamok.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/21473b485b88012765aca5eb301faa73/vazifog.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/23966425203.pdfIn PDF document text

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