Malicious PDF — malware analysis report

Static analysis result for SHA-256 86f4e118b1588c30…

MALICIOUS

PDF

51.2 KB Created: 2021-06-11 10:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 19e61b34d1e31f7d65c5f94d1e3d2e4f SHA-1: 5cc6b4a3cc9bbd554bc2b87c017247f220fb62d7 SHA-256: 86f4e118b1588c30b252e7ccf9436a6115e97107a2d310a0407646e406986a5a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to compromised WordPress sites and disposable hosting, masquerading as a movie download lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to deliver a phishing or malware payload. No scripts were extracted, but the extensive use of link farms and compromised sites points to a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7338

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://irlanc.ru/uplcv?utm_term=my+cousin+rachel+full+movie+online PDF link annotation
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080dd53043ba---80198862472.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/1579ae60e8bc257ad3cdb80d16e6c5b4/kafomazataju.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/38424277760b84e9b1acb0.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a7609ef2873---gugakilubudajalesi.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1609e832a04b7d---18536124105.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16095f2af46654---75116413181.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c13474c4dcd---33210622735.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/dozodiwedajaxofoboxog.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/93577518147.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7cb178a8f---pemupoxotojerulapabofug.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863e8a0a29b---68874092721.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/ca4489df5367b9ee6877b72e6ec5ba76/23727692287.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8c8f6768a---31223492839.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/5bcf35ea28630ef742a02cbaa1d91c71/45625220655.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/nd7vnd0kp4ev7k6qe02oa9isve/misaka.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/polipefa.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa1135b418---kalurafo.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085700fa205e---folejorumorakoxezuxoxegej.pdfIn PDF document text

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