Malicious PDF — malware analysis report

Static analysis result for SHA-256 837530760e0443f2…

MALICIOUS

PDF

47.7 KB Created: 2021-07-06 06:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5bb551a15ef2a96580f286e982c41857 SHA-1: 6ba54737f4e72ef46dcf55d4db66ed30146f7e6c SHA-256: 837530760e0443f2665fefe247f27cce828df15f0f7327e8f31e526bd18360af
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file functions as a link farm, directing users to multiple external websites. The presence of numerous links on disposable hosting and compromised CMS upload storage suggests a malicious intent, likely for phishing or malware distribution. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7471

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://mwflower.com/upimagesfile///koguxo.pdf In PDF document text
    • http://zuche0551.com/upload/file/30917179906.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles//imagenes/89621592595.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f5ddab8ec---babikujusorerukudig.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cf143801cb0---pudobemejajonumete.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/f19a56f5fd25cb39909bbca45b376f87/51039934978.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210604091828425.pdfIn PDF document text
    • http://mega.kz/media/upload/files/85284016414.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/gokipemo.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/53026759437.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/fideli.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/e7ra5gbm4ue486njjtlr3qe55h/28277387042.pdfIn PDF document text
    • http://artospace.com/pics/file/70649839700.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/e8b0a519b358f79e4439d66bed1e4475/76902283719.pdfIn PDF document text
    • https://totounited.com/contents//files/25225846234.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bce742c5f42---laziz.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/79769588856.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/tkgnpc0ssb87env2no7nenvfbb/58623384838.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/80328086276.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/10f745997554fbb1dc956d03925d28c6/82570407274.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/j9ps7s7qugu6enep0tuk6nt1qi/zaluv.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/foruwepaguseduxazeribitaz.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/tozidofizabawev.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/a3dc8c5c8722ae4bb546a8d0ad4fbc6e/sudupirenitikugox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=natural+hairstylists+near+mePDF link annotation

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