Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4b6d8507a5f3f2e…

MALICIOUS

PDF

65.1 KB Created: 2021-08-25 18:37:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f2aa5669d02ae19c32ef721ffaeada90 SHA-1: ba91e6a3707287f58c147bcc86b6386690752f76 SHA-256: f4b6d8507a5f3f2eca112c939469d2bb2e1bd990963a35cf3139650e2f3727a7
154 Risk Score

Malware Insights

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

The PDF document contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6241

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=pale+face+and+white+lips PDF link annotation
    • https://portalbime.com/UploadedFiles/New/file/46074695191.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607030919064e---bokowuronum.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608659db1a50b---85895345841.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/liwufefaxit.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/93232831836.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/xonopalivemaropekubugugam.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161059261c8952---fatopirabof.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/rk3ercn2olaghrk5g1pf6b8da0/26883424667.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b65bfb8b012---59378960966.pdfIn PDF document text
    • http://madinaboys.com/easydo%20v2.00/files/uploads/gizaraladijanojigafuxidu.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/99b5acc47a12368713b89743014dcc46/2848493791.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/nd3v2gvfu73jgua7hugmrdatvd/76599947625.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b1eafca13c5---dipulananokaj.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/46364951887.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/85001875467.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3f1dcd0bf---61691328146.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/cabc0d15629203d400b19e7e0ac4c76b/2604067306.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/5086537373.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/8420097562.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/04173cf8f8d8950745a9ddcb5d5a926a/kumadafeguma.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/7bf3fa0734a4e850fa6253a8713e140f/bonerixanas.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161245ffb2f232---54237865820.pdfIn PDF document text
    • http://master-br.ru/img/file/tepakipujavatiregix.pdfIn PDF document text

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