Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2ee5a3da982d5c…

MALICIOUS

PDF

50.9 KB Created: 2021-09-21 01:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c7324c740e0fac252c5e1680092e9b84 SHA-1: 8310dfe65dea7897a587fddbd848b9b4e19ffe3c SHA-256: 3d2ee5a3da982d5c345f89795b187f1e656d99dcbafd9317b561e3d8cc37226e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many hosted on compromised or disposable domains, indicating a malicious intent to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of embedded JavaScript suggests an attempt to execute malicious code or further obfuscate the redirection process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6796

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://chcial.ru/uplcv?utm_term=jeux+enigme+gratuit+android PDF link annotation
    • http://markjfox.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rasoberorelabipoke.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/pimeluxarojuwiliguberem.pdfIn PDF document text
    • http://www.tsahimmongol.com/uploads/images/files/8251214119.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/99992256619.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb7e4cecdf---79589203201.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/zeluxerozavezogoga.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/25283707836.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/vonodakadapifok.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/35780041146.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/fotozarenowawefiwoguso.pdfIn PDF document text
    • https://clinicscrm.com/img/files/wixubovetawonifemem.pdfIn PDF document text
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/93250584580.pdfIn PDF document text
    • http://tainanrup.longi.tw/uploadfiles/files/20210909_213443_3664.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/8ce57f2568e87b7ef9282646ad346515/50295979100.pdfIn PDF document text
    • http://artpolyclinic.com/file/files/pilafefu.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/62371946234.pdfIn PDF document text
    • http://baharev76.ru/userfiles/file/50924302583.pdfIn PDF document text
    • http://trevorhannant.com/5436651651.pdfIn PDF document text
    • https://0900107678.com/upload/file/12877867553.pdfIn PDF document text
    • http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/57000949747.pdfIn PDF document text
    • https://angelsolutions.ro/ckeditor/ckfinder/userfiles/files/zifadamisedadevevokaguv.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/wuzefuxage.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614018557a7f7---70025475383.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d255b43e0---gajalexujatawewag.pdfIn PDF document text

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