Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d1d669f58e3cba…

MALICIOUS

PDF

63.7 KB Created: 2021-08-07 01:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a58e8d73f771101cff4009672a17e072 SHA-1: b34c20adcb9954b06697fee0e1be4056832f4323 SHA-256: b2d1d669f58e3cbab86491993aeb19956df791cdff03fb6c4962b42621c41532
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm with numerous URLs, many of which point to compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary attack pattern involves luring users to click on these links, which are hosted on potentially compromised or disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7820

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://1-sanya.com/blog_images/blog_/file/3072314637.pdf In PDF document text
    • https://weilaimachinery.com/userfiles/files/69699787744.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f09fbdd66---nedupizexibofazovolaxos.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/44087471712.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16078d4bceab93---dojogofikenudaketelab.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/40bba5d2594308e03088f6523fda7804/34341815374.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/kv3a9pjhpmdjffberenq21qrbf/masikunujegawe.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/c4b6518e6f1e41cd4e75da827c32158e/79399825247.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/a11c90a1028bf5c76460f133446aeef9/36490002945.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/31683469405.pdfIn PDF document text
    • https://windsbs.biz/files/file/topuw.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/29656105654.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/paboramalazaw.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/legovapejis.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/18044133562.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/betikarenanoxoj.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/jikuvefupezawinuvituji.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d70ee21161---nebodasafodebawavanozabiv.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b591f3d36c---17032212406.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/1339917076.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/76343180112.pdfIn PDF document text
    • http://lhdrum.com/User_File/UpFile/file/20210719172940_NTA0NDM2MjU5MzA=.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/xikivaduzasaj.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/f7dd9ceb89edd814a718fcec71ada097/64499656267.pdfIn PDF document text
    • https://nevisnews.com/userfiles/fozuzut.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/7jnoni4pq7ggsboi5g73v2qm5i/sovivovezorevujar.pdfIn PDF document text
    • http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/lopirinififed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+adjust+time+on+armitron+watchPDF link annotation

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