Malicious PDF — malware analysis report

Static analysis result for SHA-256 b40d9adf0651959b…

MALICIOUS

PDF

54.0 KB Created: 2021-07-14 07:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e337783658b69cbc70a5c4b7281b342b SHA-1: 127546f53ecce3b59b3d1cb5e125ff2af6e2398f SHA-256: b40d9adf0651959b67d090a9dd95815346b0923feaae907d08b98645451d44ea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV and an ML classifier, indicating it is a Pdf.Phishing.Trojan. Heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The embedded URLs, such as 'https://nomylo.ru/uplcv?utm_term=citizen+politics+public+opinion+and+political+parties+in+advanced+industrial+democracies+pdf', are likely used to distribute phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5782

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://nomylo.ru/uplcv?utm_term=citizen+politics+public+opinion+and+political+parties+in+advanced+industrial+democracies+pdf PDF link annotation
    • http://www.adarshvidhyasankul.org/userfilesfile/7196264609.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/6c79da88cd3ac5ec400b3765d25c3d55/95601010859.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/3jq7981rha6ejbq1lf4b64q2i3/16733805240.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/4ce7094e5a177f003c7d33f9c8812c7a/finabevafodebanizap.pdfIn PDF document text
    • http://monktonlionsclubkidscamp.com/clients/9/99/99b8b5517e5fb663501b7ee5137ebf55/File/69393433946.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5af3c8c8d2aad73b3ca19425803fd118/ratibipegen.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/90486442078.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/96552467787.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16070c79f06902---pevuwikogofurarumetojexuf.pdfIn PDF document text
    • http://vietkinggroup.com/uploads/userfiles/file/sevidato.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/7953078052.pdfIn PDF document text
    • https://arerp.kr/data/file///91544009505.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/bemuluwubatazel.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/915o0mql37gn1c65p2fcil5841/68545036063.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/8608128512.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/37e5f1bdaaf556ab8fbbff89d4290b4f/zosape.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/zuxesizuf.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078122adb39b---ledamubuzi.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878cd0527da---porojupokeguzedas.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/rapazukinopanetabiw.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6f7b646bd---56098882064.pdfIn PDF document text

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