Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc24429ab2c0da3b…

MALICIOUS

PDF

73.5 KB Created: 2021-08-14 03:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: af866ec280937fad0024f7a6f2bdcf0a SHA-1: a28d2103a128d401281a126d55ca259f06408350 SHA-256: cc24429ab2c0da3b34754f836ded52c9513b1d750b79b66ff8a5b3c197bffa5a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9668

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://krisoc.ru/uplcv?utm_term=hegarty+maths+answers+enlargement PDF link annotation
    • http://www.majbrno.cz/uploads/files/52411238409.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/359169a25cc51119e3bd184469db8519/tazudoweranulijapizon.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f02127575---82651960659.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eh6ll9jl4t48jkp2a3lco8nvg3/45236010275.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b9afa6a7f30---libebaki.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/b8926536bd63639be55f029d7ffb9363/15034690502.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/mutarejuvepitozezoxiwid.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/firirumiwami.pdfIn PDF document text
    • http://sadrainsurance.com/UploadedFiles/New/file/xifem.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca7782decf6---909254218.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/sgr7egnpeslr6lf6e1q7vqr0nl/xikibukoruvom.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/ece9f7e7d3a11e1bb332b2ed0a9c357d/nifisoxasagurorakebab.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/joxowuvulosanadif.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088ba9c7d39b---bojibefitapawo.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/mutis.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160acec5588065---75895300720.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/o6t2l5r9rgcarh5ge1ke018qqh/17691138477.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/75435699418.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab4ae5a7f8---temukusixijikitosokafoto.pdfIn PDF document text
    • http://energyexcess.com/userfiles/file/81898699929.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7599913e2---90346180676.pdfIn PDF document text

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