Malicious PDF — malware analysis report

Static analysis result for SHA-256 54fb1383a9c77da0…

MALICIOUS

PDF

64.0 KB Created: 2021-08-02 07:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 927ed598c27022c868be82f14f1f1bd0 SHA-1: f54c9145d94e28b2fb3e765faa18274f3ce6a47c SHA-256: 54fb1383a9c77da077d3ac68dda75e461648a9baee5dd07aeeb9b7163024e27f
154 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging further supports its malicious nature. The document body is heavily obfuscated and unreadable, but the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7791

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://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/a3abec920788a5a05fabf94d7eaaa4fc/36509409644.pdf In PDF document text
    • http://championshipsportsrings.com/clients/23492/File/74641295941.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a573c70d290---ranuwafuvedimi.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/5bmham87c9pcaipc3cvcp85l2l/56401099541.pdfIn PDF document text
    • https://duhocblueocean.vn/ckfinder/userfiles/files/pagugovubizilu.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210722203551.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/b5c47102cc889cc1e3b35c9f396a790e/bikuvijaxijal.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/c68c9a06991b84d9f54fbfb206a217df/lumaduwipod.pdfIn PDF document text
    • https://aldwalia.com/userfiles/files/sevipilutonusigafep.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e731db4b35---99071246378.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/80115387434.pdfIn PDF document text
    • http://naosgym.com/userfiles/files/18030166776.pdfIn PDF document text
    • http://northcity.rs/slike/files/wawig.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/9a70aeb1a635d81d16b4d897d933024f/muripixesigovoxigapedug.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/95782981443.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16091b96f8cad4---9253416148.pdfIn PDF document text
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/49202581898.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/qb91mbkgd16lr79b44h2t1grp0/93915450870.pdfIn PDF document text
    • https://kaptenhoki.info/contents//files/suxofatezaxividegituwinab.pdfIn PDF document text
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f61fe4c8e1---39670346658.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/51486149181.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/dukojidigin.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd483c380e5---60820990268.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7ee604e69---83431021891.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/d14e56d6255ee5bf9589f4fae63c2d93/wanenag.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/b5da331135fd3b054f906e0550963f7b/gebuxaxidinat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=annual+leave+application+form+samplePDF link annotation

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