Malicious PDF — malware analysis report

Static analysis result for SHA-256 23c6c8849828c5da…

MALICIOUS

PDF

48.0 KB Created: 2021-06-30 19:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5f74365575f7d48a3df38e01165674b1 SHA-1: bccc064fb5e298e107ad453d7d12d0a8c5f789f9 SHA-256: 23c6c8849828c5dace61fddb0ad7e0d1c66f939b2e808798dcc3a4d36064e8f0
154 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to numerous external URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple links on potentially compromised infrastructure suggests a broad-reach malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8493

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://akcjonariusz.com/UserFiles/file/magudiravebudarofo.pdf In PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/mn12judp2tjbe82b00rkc9dcjt/73157210932.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608319f198809---24817484937.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/e498b6f12674a47426a7de32ea2c16de/48375200926.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/towofudomufotakixusukok.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24ec5ec9b1---zobavi.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/75589191686.pdfIn PDF document text
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/novubapejorab.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-4-29/20210429045955810674.pdfIn PDF document text
    • http://burattinojatek.hu/userfiles/file/51813928255.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a5951928b---kigam.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/dokegu.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6e5837166---65176418930.pdfIn PDF document text
    • https://linker.tw/files/22790720487.pdfIn PDF document text
    • https://ferropula.hr/files/savajizotixafir.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d5648f03d---70420789038.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/afb340d2fadbae8d7a857b6e63237cad/tivigagufenux.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160907a7710cb2---juximan.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/f85bc093d3ad68195f4a17afb4d8680c/51686592895.pdfIn PDF document text
    • https://keongracun.org/contents//files/getolonovakunadusozazem.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a944c22ba5e---novozivagadevebasu.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/fikajeribagivo.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/bumij.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/e519b7541e59dfc1351df20805c84997/45081594537.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=erikson%27s+psychosocial+stages+of+development+pdfPDF link annotation

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