Malicious PDF — malware analysis report

Static analysis result for SHA-256 9294e3e03d4587d8…

MALICIOUS

PDF

55.8 KB Created: 2021-06-08 20:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7911fd283fab1593839db787cd8573ed SHA-1: ce07756002b7b2a33a8d09f0e8baead960e9b95c SHA-256: 9294e3e03d4587d8b45a36d151c42601adf8278f2b1f0c224353d65960658e84
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9406

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=nintendo+switch+breath+of+the+wild+walkthrough PDF link annotation
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075cc865833d---69908002682.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/gujewowikepokibib.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/11971544387.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fdb5c145d---35344242860.pdfIn PDF document text
    • http://ballstonfamilymedicine.com/clients/861402/File/bipomonemexefu.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/s1ftoctl39edcv3t5r54frp4u2/39784215792.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/bikasakaxuxulip.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/kr5ugtst5m6aiklhavdom7gu78/64123263536.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/329deb8c313a32ed077409cfc11f8ffb/75952266817.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075bce1ee88f---donowididisaxono.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/ihb8nl7fuqk3b09405hcd7va6c/pojurudaluxowofukufipe.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/xefevanimutidatafuzakod.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/59548093af0ab262e114d4e2b6745abf/pesejizedizukeniwidejape.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/8e0f8b8f6e6a7bfaf64a16d63f3d06a2/mifegozumudalogafez.pdfIn PDF document text

Related samples 8

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