Malicious PDF — malware analysis report

Static analysis result for SHA-256 4967b40b119c938b…

MALICIOUS

PDF

77.9 KB Created: 2021-09-03 08:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7440557a10a71ada364fc46cde9e8cbb SHA-1: 7d5a5d3bc0ff78a962b1b23af751b31ecb6f173f SHA-256: 4967b40b119c938b4daf2203cefa4f0309a2e38c4490266cc8c402c4bb4da8b6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous external links, many of which point to compromised WordPress sites and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6792

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://cructi.ru/uplcv?utm_term=modul+statistika+pendidikan+pdf PDF link annotation
    • https://yingzhaoliuart.com/upload/file/87861671672.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/valevokobobosidevagaso.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948915c76c4---nanizadanuvutobisotulo.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611962051c1b0---kasejetu.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/e1am4r0s0ralljq269lhb150m4/vofexa.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/64665972100.pdfIn PDF document text
    • http://smeeing.com/userfiles/files/kunazewer.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/e45c5e4b36387734eab0a8e4cbad358a/jefokewavuliwakanufudobep.pdfIn PDF document text
    • http://palirna-frydek.cz/uploaded/file/fixajewiwevad.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16116cda4e0e10---39668400214.pdfIn PDF document text
    • https://isleo.com/i_photos/file/jizeji.pdfIn PDF document text
    • http://vanphongphamhienluong.com/upload/files/zamozuxurekavujujitinajej.pdfIn PDF document text
    • https://procogs.com/FCKeditor/file/jinazovagezirukope.pdfIn PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/4154080326.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/remixoduxak.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/gigiti.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e931e0446cc---70617009510.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160866d444eb5d---78171483976.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/71290669361.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a207529a46c---vewixekizadilufakivebifud.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/018e7ef63e0be487bb18a30f74fb70c2/rafep.pdfIn PDF document text
    • http://chikatere.com/Upload/files/75544459373.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/wuxidovijugejilokimiz.pdfIn PDF document text

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