Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fef5af7cf93b6d8…

MALICIOUS

PDF

54.6 KB Created: 2021-08-07 15:17:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ec16b7de10f7e72e826429dee666289b SHA-1: ca4d91d5c107ea63f12ab737a6b6b07a1db5a0d9 SHA-256: 5fef5af7cf93b6d81ecf43985d0b10ef4f92011c2697fcde9598cbb73391e75f
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. This pattern is commonly used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7612

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://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/04ff0a68e7db0c381b2fd9dd1dc7a1fc/7503290409.pdf In PDF document text
    • https://datxeninhbinh.com/data/dulieu/files/nivudowupa.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/43578610692.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607051cb41926---40299445735.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202107311442175248.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210619163442.pdfIn PDF document text
    • https://marblobathware.ph/app/webroot/img/files/rominutozarevulilemifize.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ql4an8t4guemjt04t669scjctc/36379854976.pdfIn PDF document text
    • http://sisparts.pl/zdjecia/fck/file/labus.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45dd797df2---zavidikubowuv.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2813d41e3---57067835233.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/6f3fb0a6e53d51fecc80b85e2725621f/884601765.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/3752444234.pdfIn PDF document text
    • https://lordoptika.hu/files/files/98583706519.pdfIn PDF document text
    • https://fanaf.comarticle_ressources/file/banosid.pdfIn PDF document text
    • https://bdcomunicazione.it/file/bivofekisetodelov.pdfIn PDF document text
    • http://www.kidnuri.com/wpIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=5+characteristics+of+an+effective+listenerPDF link annotation

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