Malicious PDF — malware analysis report

Static analysis result for SHA-256 2241876e7ac29096…

MALICIOUS

PDF

54.0 KB Created: 2021-09-19 17:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 58d360953f74896da4d9f05610c9435d SHA-1: 0d2ffa8bc0d6f810358a04c3b86e6bbafdba578e SHA-256: 2241876e7ac290960c8e85d85bb376c30a1f6c57878543534b27c6187d440098
124 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a phishing or redirection scheme. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. The file's structure and link farm nature indicate it's likely delivered as a spearphishing attachment to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2555

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://soechi.net/userfiles/file/bezekujib.pdf In PDF document text
    • http://self119.net/upload/userfiles/2021/09/files/210903015107.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/mm731ujq4nue799fn6p1vl4lan/bamavunapijozo.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa6604d2f9---nupet.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/43370624424.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/xoxagazuvewijegusikiwedo.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/6492644176.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd7c91d728---sexolowiz.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/161352cc67ff44---nuzalebadoni.pdfIn PDF document text
    • https://ita.kru.ac.th/ckfinder/userfiles/files/xezasodijetulaxurokupubex.pdfIn PDF document text
    • http://beverly.kopanramen.com/uploads/files/fisopitowibudir.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/23337455164.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/38664785055.pdfIn PDF document text
    • http://villkasz.hu/editor_up/43071986544.pdfIn PDF document text
    • http://www.moyekolodin.com/files/denazirotobereruwarago.pdfIn PDF document text
    • http://artsar.pl/userfiles/file/bexaja.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1614080099c16c---6345523547.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/soromupizone.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/fazutiwozidenafef.pdfIn PDF document text
    • https://2acontractor.it/images/file/50437709838.pdfIn PDF document text
    • http://vagyonvedelemszolnok.hu/admin/fck_upload/file/motelupuvevexigusezubav.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef8ff1d119---5475092846.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/52104376850.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/8628013158.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/solonolukusejagutadewa.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/bedoratirakafojiko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=ghd+sports+downloadingPDF link annotation

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