Malicious PDF — malware analysis report

Static analysis result for SHA-256 f558ab89e872e7fb…

MALICIOUS

PDF

49.1 KB Created: 2021-09-02 23:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9bb2250a4e60ad237caca2d39904d5dd SHA-1: 5b5cb86a48d3182697759097739fcd653d52a445 SHA-256: f558ab89e872e7fbdfa593ab63cfe03661effa8ff9f285b3578bde62e1baeeef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to various websites, including those hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content or phishing sites. No scripts were extracted from this sample, but the presence of multiple external URIs and the link farm heuristic strongly indicate a malicious intent to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8963

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://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/f509dfbbc4e2deebc878ec821e7e4b87/newarajiwenogixaxi.pdf In PDF document text
    • https://wheelmartthailand.com/image/upload/File/luzibelawovikuwubo.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/22832861326.pdfIn PDF document text
    • https://hoya.hr/UserFiles/file/45618741402.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/1mvnjob02481jmgaejh1f8lm2g/77095766276.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/f69nb3oo6u100ttoo18n4uo8mi/funexeroj.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/nulerorojozofaxazop.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/64399703135.pdfIn PDF document text
    • http://synergytaekwondo.com/click2buy_newp/userfiles/file/bedozuridepas.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/tivolipuvuranigirekibosu.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/sufipumedij.pdfIn PDF document text
    • http://zuche0551.com/upload/file/91386694928.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/76137246fffaef68af0af331c41e2980/52858638402.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/a5c72235ca558a3e26f7f1417b74d52b/ritiselabavomajak.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/62784717664.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/lenox.pdfIn PDF document text
    • https://rarahil.org.np/ckfinder/userfiles/files/doranozazepef.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/lopujonuxizida.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/f0721b0e9496a9fb66ff7a0c5df45f89/61466367293.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02baccd1ed---kafoxojet.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074409cec5fc---19700666510.pdfIn PDF document text
    • http://tythb.cn/uploadfile/files/87765030852.pdfIn PDF document text
    • https://ichibaninfotech.com/ckfinder/userfiles/files/40691847357.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=grade+11+chemistry+textbook+answers+pdfPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf784cb97f---45645280770.pdfIn PDF document text

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