Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b87779ea06d1900…

MALICIOUS

PDF

58.2 KB Created: 2021-10-06 01:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 4e1301deb9952309e030b3df7f36c2b5 SHA-1: e6ae768bbdc1ecd2ad9a12fb2ca26e07364d4085 SHA-256: 4b87779ea06d1900dc3ffc330ddfc09175c53e1ebfec3fa7af8f22429ba5b26a
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to domains identified as compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm on potentially compromised CMS upload storage suggests an attempt to obscure the true destination or leverage existing infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6837

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://apskarota.org/userfiles/file/gorapib.pdf In PDF document text
    • http://www.pilartangguh.com/file/latoluladumal.pdfIn PDF document text
    • https://indolabtek.com/Uploads/userfiles/files/doforologivenanukiteto.pdfIn PDF document text
    • http://special-pharma.com/upload/files/jabupanepakarenarogumo.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/59990070511.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16138dfc705608---87789146858.pdfIn PDF document text
    • http://kozelskadm.ru/files/uploads/files/goxex.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/kevozatifobaxawajitati.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/72836024684.pdfIn PDF document text
    • http://bk-plus.at/userfiles/files/duwirililamabam.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/5u51nal9fk8haom2hbjl8v1um3/kixemugibapato.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/66026406755.pdfIn PDF document text
    • http://thomas-zigon.de/images/file/95588786805.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/wegobolowur.pdfIn PDF document text
    • https://noddy.nu/images/file/82098438494.pdfIn PDF document text
    • http://studioguidobarbieri.it/userfiles/files/kajeregukigoz.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/bhr7cs1p9mnhmqn3r1aj28t7nt/vivuxeruxofoxugojupojasam.pdfIn PDF document text
    • http://ibb-online.ru/f/file/52033593596.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/13989345780.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/62301246428.pdfIn PDF document text
    • https://xn--fct5g39pjpo.tw/upload/leakstop/files/33285718863.pdfIn PDF document text
    • http://elrey-uslugi.ru/media/file/joritunagizafituxegiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=introduction+to+shaolin+kung+fu+wong+kiew+kitPDF link annotation

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