Malicious PDF — malware analysis report

Static analysis result for SHA-256 687745879e07a9d8…

MALICIOUS

PDF

53.9 KB Created: 2021-07-03 22:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 476b60d4adca4b90bb8e3a2af3450cc6 SHA-1: ec258a131f55494c66501feb4b3ab2272722e9d6 SHA-256: 687745879e07a9d8e3d5feebea5722de798170bb857c22955e46e50c7e6c8ee0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to host malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or trojan distribution intent. While no scripts were explicitly extracted, the nature of the links suggests a potential for redirecting users to malicious sites or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4912

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://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b849cd3dea7---53595214653.pdf In PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ccfa8bb53---32955935575.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a642a2563cf---82674451443.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/e699cebcff05c6bda9c5a04423bf9c94/94044645093.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/202d8dc7dc1db26c2ce3eecf26f98471/birizu.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/nivokemotisixetelisumaraf.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/fa0a963ee596a81441bad2249b21fac3/81817080249.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/delubupikav.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b67e00068---35812305036.pdfIn PDF document text
    • http://daivupaint.com/img-chamthi/files/womevupe.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d4e710534---73018311438.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/mvm8gakojpkgs02j1ff1lm7l2i/vawowidiwetigegafigad.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/a1b50335a223f54d2c6e1648e6e43526/1877560239.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094450fbf3ee---zikukakaxukovujev.pdfIn PDF document text
    • http://usmleworkout.com/files/file/kejetoranusivewojemivub.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16073b4ad388eb---55150306206.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/eis3ifs6gd05l0bmjgm8an1hon/getasezid.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/rexidobebuko.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728d1d5fdc1---11835709154.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/58311947037.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/91e4abaefe0cc17a0fcb296f1f6dc26b/79973962372.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba84062c53f---dewiguzixuxovakog.pdfIn PDF document text
    • https://edinburghpools.com/contents//files/8406362271.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/66981321042.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=ark+red+dye+commandPDF link annotation

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