Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced9f82547336aa9…

MALICIOUS

PDF

60.1 KB Created: 2021-09-23 22:35:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c85c657656ebc973f8706e82e39e0dc2 SHA-1: 5db824cfc8aa86837341123c4f708496fa05ded3 SHA-256: ced9f82547336aa978c4fa93df508bf96fcfd93bf9d82f25fcbb532019e83fb7
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to compromised WordPress upload storage and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The embedded JavaScript is a primary mechanism for executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6606

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/11048229082.pdf In PDF document text
    • http://www.superior-inkjet.com/login/ckfinder/userfiles/files/91924410340.pdfIn PDF document text
    • http://autoscuolemontagna.it/userfiles/files/9351408383.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/8f4cb1d6180623bb15506dc18de44680/nolasopalafukib.pdfIn PDF document text
    • https://www.kindspring.org/inc/ckfinder/userfiles/files/polafubezulowegubam.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/kupirirubokuxaval.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f088938a5b---16674532441.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612edf26586fc---besekukibuwojozozubidog.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/a78865035a74f34a4c55bdc02d389c9e/xaruliwipibaparapekigexa.pdfIn PDF document text
    • http://zkqzl.com/uploadfile/file///2021091101111587.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/bekizamefas.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613808f44f986---sijaborudoj.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/fedamiritof.pdfIn PDF document text
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/wuwufaluzasaratutiki.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/fusotugaz.pdfIn PDF document text
    • http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/dodosodaziganeta.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/76877857243.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/sebizenapobepusejigidokiz.pdfIn PDF document text
    • https://ipkameros.lt/userfiles/file/50259746728.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/78875616455.pdfIn PDF document text
    • https://southernwashpros.com/nbloom/fckuploads/file/25373131837.pdfIn PDF document text
    • http://hz-kontejnery.cz/ckfinder/userfiles/files/kudavugokug.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/jixumapokefabegumawevomok.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/tijewifeser.pdfIn PDF document text
    • http://turismo-usa.com/files/others/44839981377.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=talking+tom+2+cheatsPDF link annotation

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