Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb341160e1645af…

MALICIOUS

PDF

51.1 KB Created: 2021-09-06 18:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 54414fb6602aee8ea7f5f280b6468b4d SHA-1: 900f6e02fd501c059a44b01a0c90f48520a6b720 SHA-256: 9fb341160e1645af2cd15e26a668e3374a69c336fe77e0c9be14c14aa996b522
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable domains. These links are likely intended to lure users to malicious websites for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4952

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bayihoki99.com/contents/files/64027362682.pdf In PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/5de2cff0f8597437299ad5848b0ff99d/duranebozonidi.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a00096a48c0---6923826787.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///88951102360.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/13472497341.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099822ac84a6---mexareki.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160ace9dfd6e9c---46257121103.pdfIn PDF document text
    • http://smartcevent.com/clients/871459/File/dotanubafig.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16095eada0e48c---34466152888.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/48816039061.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/69038955971.pdfIn PDF document text
    • http://zuche0551.com/upload/file/togogakurusukemaxidoroke.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/87677d0040f3befb6ed38b442f18b5ff/18978591075.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160712ca142cc9---83250422560.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/52430559347.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/rqh88kjpqsv475i8jp0u5pfbs1/24529450136.pdfIn PDF document text
    • https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/70158349474.pdfIn PDF document text
    • http://reedxtrainternational.com/uploads/pages/file/75731519849.pdfIn PDF document text
    • https://tagoproperties.com/ckfinder/userfiles/files/65931553945.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b50daf15d70---gagalugazazivoto.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6700701c26---pewuzuwogufe.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/093e1bde5e2f1a83b2f03d5c51a9c47d/medifirofenunufifu.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/sazozone.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/96679f6e18c8ca6f19a96e18258e3125/98570057626.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=tuberculose+miliaire+pdfPDF link annotation

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