Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff7005756424a1e…

MALICIOUS

PDF

62.5 KB Created: 2021-09-07 11:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a878785ef48d158b0484a0a388e972d0 SHA-1: 6dbabb97830a0c458f04b63a947b712cae1776ac SHA-256: 1ff7005756424a1e8c650b83a4ed30dd37fd44a91aed764913942c87eff80993
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF document identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs that point to external websites. Several of these URLs are hosted on compromised WordPress sites, suggesting an attempt to leverage these platforms for malicious distribution. The document's structure and the presence of multiple external links indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7215

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 http://traslochimontalto.it/userfiles/files/6620212297.pdf In PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608532226e206---weravogoxinogasodirava.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f59375547207e1466653916dbc9933b9/54022458438.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/fojupud.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/iv8agasmjvmt1mj5d917eaksj3/wozixosi.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/45851048996.pdfIn PDF document text
    • http://clase86marista.com/clients/25276/File/gezivanarimameju.pdfIn PDF document text
    • https://123natura.com/stockages/files/mejufivolizopumuxawaxipa.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/uotjp89s8oh93d474iu2cr23g6/34496596832.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0ed810a62---92414397438.pdfIn PDF document text
    • https://kham.vn/userfiles/file/20362821588.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/56186146856.pdfIn PDF document text
    • http://fcgo.tw/uploadpic/files/1346597575.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5dca33a8af---vesinifokokazowedokure.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/53212960930.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/hg9rspc0mg1tu9ed4d68db7ub6/dekoralarovupijavuvoxof.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/e66998ec95e5dda58aa05126104bf3e4/88030361098.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/xaruwobibekokiwibebuz.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf2e71b061---gafijekepurelunufura.pdfIn PDF document text
    • http://bsinteriordesigner.com/userfiles/files/62235063609.pdfIn PDF document text
    • http://limitlessillusion.com/wp-content/plugins/super-forms/uploads/php/files/237fb9452083628e8ffb3e117033e3c2/16355001921.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=linear+programming+in+quantitative+techniques+pdfPDF link annotation

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