Malicious PDF — malware analysis report

Static analysis result for SHA-256 70212115ab38fc3b…

MALICIOUS

PDF

68.3 KB Created: 2021-08-11 17:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3e31f6706ed357c1273c17c7f2327c6d SHA-1: 89f7dc9c7b961911f2e06967d8c341bece84d25d SHA-256: 70212115ab38fc3bdb1e3df3558626241df7a83961f2d37c5e2f322ec1ca7367
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories or appear to be part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8802

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://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/025vbbitc9p4plruc8fpgp8q31/85441760382.pdf In PDF document text
    • http://duralinealu.com/upload/files/sitaza.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f47d2826e---42736038298.pdfIn PDF document text
    • https://tunhuaduytan.com/upload/userfiles/files/5061430612.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929d457033e---59531689872.pdfIn PDF document text
    • http://ave-france.com/pics/files/73989349704.pdfIn PDF document text
    • https://nguyenvanhuongloc.vn/app/webroot/files/images/pages/files/82278577089.pdfIn PDF document text
    • https://bdcomunicazione.it/file/babomilipatovugisi.pdfIn PDF document text
    • https://geniodelweb.com/file/3811490280.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac27de6f0bb---vokabozabulike.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/pevonusa.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/jaxakelevubexur.pdfIn PDF document text
    • http://fabiocaronearchitetto.com/userfiles/files/4844071199.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/2f8dc613b8b6a5b793aa195945111026/masadusizulape.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/jb8km7nudp72dvri3knblbg6ib/rajiwusevavaduxiresaketot.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/xijiminugekutuvonepudun.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/85250016373.pdfIn PDF document text
    • https://hiroyoung.com/data/files/jeniluwusedu.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160e0e79dd29f5---51905901087.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/kdn5g9g2sks00p7i5vl66gb4ro/rozijelibebuxokisebos.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608956b554207---23863019400.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/devijijuxutabak.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/xadajatomepewawesom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=sword+art+online+fatal+bullet+trainer+2019PDF link annotation