Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c0b3897a1cfedc…

MALICIOUS

PDF

54.0 KB Created: 2021-07-03 12:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7f4f037a7e17cbbb6e5d1b3d8fdb99f1 SHA-1: 228a8208340984ddc08cd2fa4d8ba5cd86802bc3 SHA-256: a8c0b3897a1cfedca7bc211c781be4c15dffa88dc2422daf58c45fee3de0fde1
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 a link farm with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of external URIs and link farms indicates an effort to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5894

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://drafthe.ru/uplcv?utm_term=unavoidable+in+a+sentence PDF link annotation
    • https://lapalettedesarts.fr/gestion/file/68680355024.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/34887206909.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/30tgsaprk6j0bprbvpp4njglac/69856075857.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/6164bfb312e64df2dc83ef06246a6489/rolur.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9a390368c---wusafebusalizasiterojuwun.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/40255763968.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/936a19a6055c51270b2adeb27dfc6a03/12898981770.pdfIn PDF document text
    • https://ekransamara.ru/files/17496729519.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815059e5aef---4109098595.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/24640248244.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210528_7292DE3515D95B5E.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a5e97cb9a---31117263228.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/mabaxarumozovakupapaw.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/c0d8b46bb7458dc3a67f1d0d834b92a1/77264772075.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081421c074f5---19397133427.pdfIn PDF document text
    • http://techbico.vn/uploads/image/files/nekamutugitepomiwinapup.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a08e21bf7ef---71505948940.pdfIn PDF document text
    • https://stopserv.ru/files/file/jajizumaj.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b7258f65c---63101081043.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c594bc71a20---topotuz.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a5cf39ee5---mozozexetilupekize.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/4566ff198be9b31dfc4eea1280029b8a/26209892268.pdfIn PDF document text

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