Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac26c0a006c573d3…

MALICIOUS

PDF

62.2 KB Created: 2021-09-13 05:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 531b1c6bf7ea9340ea4e02c06215ce7d SHA-1: 91fc28e94764622b8e0aacf498e259a45257a7d3 SHA-256: ac26c0a006c573d3aecb1db95c09651a95e37bdaac407cb09da4bf976479d6a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites and disposable hosting domains, suggesting a phishing or malware distribution lure. The presence of multiple PDF files hosted on these domains indicates a link farm designed to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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://libertyquad72.fr/userfiles/file/petetixarikozo.pdf In PDF document text
    • http://queenart.kr/userData/board/file/rolijoju.pdfIn PDF document text
    • https://vanphongphampmc.com/upload/files/labomasum.pdfIn PDF document text
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/50817278114.pdfIn PDF document text
    • http://fabiocaronearchitetto.com/userfiles/files/nazovukogofogudu.pdfIn PDF document text
    • https://partnermind.cz/images/files/tifosan.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161386bf5ddf6a---pefeloziponefakoju.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/94911633975.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/pezonuvizitunezulov.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/gizon.pdfIn PDF document text
    • https://naveenent.com/administrator/imagetemp/file/71233151329.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ce8416d37---vusixazozifej.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353ae921b81---6090493400.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136482de7a4c---funivez.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613afef1e88b5---29968994597.pdfIn PDF document text
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/60869329242.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/miguf.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/95441907897.pdfIn PDF document text
    • http://futboltotal.net/images/files/kakufuti.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16131a956a14b0---fobasafuses.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f570f3c268---wigelaxijubiviket.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/43438521037.pdfIn PDF document text
    • https://vinaarc.com/app/webroot/files/ckfinder/userfiles/files/tetidakarojipikopefo.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/40066302898.pdfIn PDF document text
    • http://miwon.com.vn/app/webroot/uploads/files/rojenuzuvukuvonojalile.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=videoder+apk+download+installPDF link annotation

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