Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c5efb11e21ab9e…

MALICIOUS

PDF

56.7 KB Created: 2021-06-30 17:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: a00768204b08463a6d3e3ab27720e732 SHA-1: 1752b2c1693dd8e15bb34fa74578cb874c7932bf SHA-256: 99c5efb11e21ab9e5aee09e7f6fe2337626f04454745d7845b297e29459f7e13
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress upload directories. These links likely serve as lures for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5305

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://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093de95435a4---dezebiribuj.pdf In PDF document text
    • http://saiprogetti.net/userfiles/files/84186119764.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/b7795d6513ea7d8c8a0bdd034f51c6b9/geribirasuresiv.pdfIn PDF document text
    • http://learningkey.org/userfiles/61455964771.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c81acce153---zonubenixibepififugizijej.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d520e5138---16002451464.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb246042b50---nirowiwebolezus.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/8acb1f99a385b202b6fecf2e5159d720/18776512374.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bffdc917a06---88786986967.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210629235455_429358938.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/topateregobosufidizagub.pdfIn PDF document text
    • https://areicon.com/images/file/paxiwisifu.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/a170d7m64ru2467m358d2m7tj3/riwizerezafatun.pdfIn PDF document text
    • http://parkhighclassof60.com/clients/871169/File/xubifuxofavamitinuworu.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/b1f9c2e3d3d21224a8ecc520c2993943/40858215764.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b77293d2999---88036032394.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/370b3dc910a9b63540044276304c9c6a/87747012546.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24476373894.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa248080b35---rapigajajosasobosu.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/hbe0vftdmg1e2o9dt6t6qmjfmt/42672096709.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/32906170388.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b91dc1574---timodopuvufukanetumu.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f0515a5cf---kepen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=fasco+capitalist+meaningPDF link annotation

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