Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfebd0e5f63ec697…

MALICIOUS

PDF

45.7 KB Created: 2021-09-27 04:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6d72bff46741fb98328b4437f4d2eafc SHA-1: ea26c972339512221c86a7de1d99609c3f3b2991 SHA-256: bfebd0e5f63ec6974228510a392cd7abb32ddda565e1cab8936c51f8786f5a1e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm designed for SEO manipulation, likely to redirect users to malicious content. The presence of external URIs and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4888

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://queure.ru/uplcv?utm_term=tap+top+game+download PDF link annotation
    • http://jingluo.net/uploadfiles/files/mikeguwijijit.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614834c7edfc1---21692001751.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613c28d9a9b18---58508538218.pdfIn PDF document text
    • https://hlj-vibration.com/uploads/image/20210920/files/20210920071501.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/wovirejubolefixiwos.pdfIn PDF document text
    • https://ceylanotel.com/firma/files/89614388217.pdfIn PDF document text
    • http://laptopcuhaiphong.vn/upload/files/vipeb.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/vuwigokuno.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/bafiwotofaposipevab.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/93554398419.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/254785653f59ce1d80a24cbe984c8f33/50002697893.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/21836726661.pdfIn PDF document text
    • https://muzpony.de/obrazki/file/85563212261.pdfIn PDF document text
    • https://lenaoyunlar.net/calisma2/files/uploads/14714170759.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c99ea1b880---57421858286.pdfIn PDF document text
    • http://bwc.lt/i/24063199278.pdfIn PDF document text
    • http://peak-experience-japan.com/images/blog/file/bivakafafes.pdfIn PDF document text
    • https://corcreation.twbiz.me/data/fckeditor/files/20210923_140145.pdfIn PDF document text
    • https://riwg.in/userfiles/file/95921123193.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161338cf61130d---58015252433.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/leremadudebefavufolaw.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133028f856f8---lenefufekivesumirunimur.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/6e1a3baf08235c559e705dde5e7efd3c/44235062380.pdfIn PDF document text
    • http://eksternest.be/images/file/xufivajajodu.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/paromelejupi.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/daves.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/37161331206.pdfIn PDF document text

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