Malicious PDF — malware analysis report

Static analysis result for SHA-256 1402de56e6deec24…

MALICIOUS

PDF

63.6 KB Created: 2021-07-21 16:03:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 79f3e331f97d8d30777b2a2086a71565 SHA-1: a9ee53269f38cca943ed74e30d67d023c526ad0d SHA-256: 1402de56e6deec24c5695363df6a7d28c57ee4b8a795cc1e70d906930d96dd42
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9770

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://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16074dc11799ec---26588538115.pdf In PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c53759ede88---30485077310.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/fudifejafo.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0303521001620076582.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ch0ej3n1krjvrs7pkcova6m1r5/63641464507.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/ee318830bf429dcf55de3a53ccf5d1a3/jitafa.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/l8veuv67jqgt2uq9a66bou42k0/22221688787.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/543c0f3bb66d522085418309f0727eca/12670954620.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/kowowokaloxelali.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16083fbed09de2---31925463414.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/9or05t8psi1laeqvc7h2i83e2t/14299421521.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/vulinuxodezodebigizup.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/9262056906.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/35929818485.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/92959715350.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/26455743127.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/9vkfnlvvh601bvbi5g4fs2g784/noluvakunanek.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160942b4b25667---49132361991.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/78298301788.pdfIn PDF document text
    • http://uralinteh.com/uploads/files/30005900723.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/43366ac6a44fb2a67d089c091993cd2d/67109927615.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/32983534110.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/d0c657a7d8ca1cb9abfec23cde2599e4/dogum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=boldly+to+the+throne+of+gracePDF link annotation

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