Malicious PDF — malware analysis report

Static analysis result for SHA-256 605b2a74b22ebb6f…

MALICIOUS

PDF

60.9 KB Created: 2021-06-10 18:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: abde52de8fff694ea3f0b6380acbf785 SHA-1: cf1af47b541764ffb2316d08e1f1df4ea4d7e22d SHA-256: 605b2a74b22ebb6faf36f6156675c648a9050d1c0499eab6d488b862b91d3e54
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links pointing to compromised WordPress sites, disguised as a driver update lure. The ClamAV detection and ML classifier indicate malicious intent, likely to deliver a phishing payload or malware. No scripts were extracted, but the embedded URLs and link farm structure suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7213

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://coretry.ru/uplcv?utm_term=amd+bluetooth+driver+windows+10 PDF link annotation
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/nr1v04qta0508qt210it99dadr/84878806105.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a175d39bcd2---46285009122.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/tulurugumirigenudopivu.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c18a60ef6dd---pimonumogaremisesim.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf9207c078---15345015649.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6d2756d16---lunaz.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a650c6a636---52204808307.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079596069490---mopizadavuvatedenivol.pdfIn PDF document text
    • https://rajatotogroup1.com/contents//files/letevunebaw.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/1v914b7959por61arc8q4quclq/31548680192.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160717e41e3dd4---41171308394.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0b23eaeec---21433704884.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/j8nllnpf7tangbe08fiq09s1od/govavor.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-6-10/20210610025531217008.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a9876773c83---74228146193.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16070208e1beca---34973912799.pdfIn PDF document text

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