Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff4a195ff2c668fa…

MALICIOUS

PDF

42.9 KB Created: 2021-09-19 03:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fb4d6eca953a642d4529d0900a6fdb5f SHA-1: 30063adb0f2e7ddb83806bdb4a9cd92d87c9f51a SHA-256: ff4a195ff2c668fa073e7185a98ee60195dad78d60e7f287e4cb8d9d491b221b
162 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, many of which point to disposable hosting or compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7479

Heuristics 6

  • 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.
  • 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 http://jubangh.com/Upload/FckUpload/20210919file///57957993501.pdf In PDF document text
    • http://tiszaladany.hu/upload/file/piwudepasazamokevejelaw.pdfIn PDF document text
    • https://gkia.org/kingkong/userfiles/files/85513294795.pdfIn PDF document text
    • https://www.gpaci.org.br/cms/ckfinder/userfiles/files/wimejonafebobosegukapif.pdfIn PDF document text
    • https://recrut.com/files/files/55664145006.pdfIn PDF document text
    • http://spzpoz-zdunskawola.pl/upload/file/remametejaku.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/sajojidiwowovef.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/nisasisar.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/161420020711da---58257045871.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/40934133852.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/161395d6e3c3bd---lifurona.pdfIn PDF document text
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/69510044530.pdfIn PDF document text
    • https://dermatologie-chamonix.com/userfiles/file/83354408883.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16140be68b1554---10410513097.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/15997889077.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/73647039559.pdfIn PDF document text
    • http://optimaglobal.net/ckupload/files/fanorazidomewulofute.pdfIn PDF document text
    • https://estudiowebcolombia.com/ckfinder/userfiles/files/88310716700.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/24565092523.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/vilireteteboba.pdfIn PDF document text
    • https://agros.net/uploads/file/mejogepolufazefe.pdfIn PDF document text
    • http://vallovin.it/userfiles/files/rawasudelufalirunovuxena.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=mix+explorer+apkPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/0ec337198363c6f6093f9eace3f03c50/46789737527.pdfIn PDF document text

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