Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab4325ba841cb4ed…

MALICIOUS

PDF

57.8 KB Created: 2021-09-12 08:35:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a26be7d5e0a8b987663df3de6e94b5a4 SHA-1: 4ff6135b8e3fbb7a7440796971b03f7ee22a3894 SHA-256: ab4325ba841cb4edcb6bac16442f76bc55a07a6f935c558ab626ff286e4af320
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of phishing or malware distribution attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5422

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 http://studioguagnoni.it/userfiles/files/namirebomavomitixera.pdf In PDF document text
    • http://drkoopman.nl/cmsimages/file/vejikirurimutuma.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6aa0a1c24---23726423015.pdfIn PDF document text
    • https://tekstilkentrehber.com/upload/ckfinder/files/38978057618.pdfIn PDF document text
    • https://www.tyrtaios.gr/ckfinder/userfiles/files/befotizusade.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/161370c1e96b14---dexejitakom.pdfIn PDF document text
    • https://doanhnghiepvietnam.niengiamdoanhnghiep.vn/img_duhoc/files/joxurolenuw.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/pijepijuzonanaxapejox.pdfIn PDF document text
    • https://ahirealty.in/admin/userfiles/files/94881734680.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/rulenuxogix.pdfIn PDF document text
    • http://1day2night.com/UserFiles/file/2192551253.pdfIn PDF document text
    • https://madeirashopping.com/userfiles/file/ravuvezotiwelo.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/sf42l4krfa981rr14c1apfn3m7/53389611640.pdfIn PDF document text
    • http://szjg.hu/images/file/vaxalujunaxe.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/fowanazis.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/24656487740.pdfIn PDF document text
    • http://rezidencianestor.sk/app/webroot/files/ckeditor/files/rabiforokaxus.pdfIn PDF document text
    • http://podolsk-kondicionery.ru/upload_picture/file/xufasuzeg.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/69053279912.pdfIn PDF document text
    • https://servauto.fr/img/user/file/6130879909.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/wojami.pdfIn PDF document text
    • https://pecintajp.com/contents/files/25163243448.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=free+soccer+streaming+apps+for+androidPDF link annotation
    • http://louisiana-arts.org.s150269.gridserver.com/siteuploads/editorimg/file/72580153414.pdfIn PDF document text

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