Malicious PDF — malware analysis report

Static analysis result for SHA-256 b61c3c3a743c4abb…

MALICIOUS

PDF

47.7 KB Created: 2021-09-27 19:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 836bebb818f343ed32cf86338064aae9 SHA-1: 2333ae9be926d26ce8f8a5285f3659fe8c290d1c SHA-256: b61c3c3a743c4abb356e7f851bd481aaea11f0e7612a0fd650656f17d58c042d
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS uploads, indicative of a link farm designed to lure users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The ML classifier also flagged this PDF with a high score.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6649

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://csc020.com/userfiles/file/20210919202439_93nacw.pdf In PDF document text
    • http://hangquangauto.com/files/gurolenofudiw.pdfIn PDF document text
    • http://dealershop.es/camarasegovia/userfiles/file/52260965767.pdfIn PDF document text
    • http://thegioituigiay.net/uploads/files/daxavarolafolorama.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/22438598645.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210923000714.pdfIn PDF document text
    • http://www.andreapondika.cz/file/mavujim.pdfIn PDF document text
    • http://hoclaixebinhthuan.com/upload/contentFile/file/gagixinajakof.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/9499593989.pdfIn PDF document text
    • http://inteko-tula.ru/f/file/46575025519.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613a901dc3e5a---wodexinakav.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/1ffea321f212ebed7dc69a4dd1c9d5f3/rarutuzanuvojudapeki.pdfIn PDF document text
    • http://ossokahve.com/upload/file/xazekadebij.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/89002955640.pdfIn PDF document text
    • http://twgo8.com/uploads/base/files/202109060451197748.pdfIn PDF document text
    • http://mrrb.nexgendevgroup.com/files/78407860226.pdfIn PDF document text
    • http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/96975463065.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/88958330106.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614165c436c0a---jebenaxor.pdfIn PDF document text
    • https://pasarantogel.com/contents/files/zedur.pdfIn PDF document text
    • http://sualpturizm.com/userfiles/file/98293034833.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/c38bbcebl9l1j523uk4idfmm81/bopesozifakuv.pdfIn PDF document text
    • http://pol2-simf.ru/userfiles/file/pugomumufidifokovogopa.pdfIn PDF document text
    • https://xn--90ah6akb9e.xn--p1ai/f/file/57221618243.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/zemuwilojunikatodoboxas.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/lavuso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=what+are+the+three+lines+of+latitudePDF link annotation

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