Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b4063d7719edc1…

MALICIOUS

PDF

229.5 KB Created: 2021-08-09 00:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3428d64a57e0cdb134da314cc7f1eacc SHA-1: 7a60d42120c7cae742903d73930b86fbbb0eadf3 SHA-256: e5b4063d7719edc1f98238aa72ee2b0f2257ce50d955aee5eb0fa1ecebd94a9d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of numerous URLs hosted on compromised infrastructure points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9776

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://ridgefieldpark1967.com/clients/3/39/39eebdc8797e30ee23d4fd57d071fd44/File/jopuleziputibafibenatobu.pdf In PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/n2oalf9l142855m8otojiai6e6/87275233725.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1026c18454---vazugezov.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c93e7761c93---vuwuvurikeveveximop.pdfIn PDF document text
    • http://agro-partner.com/Image/files/pejapefi.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/kobatezerenedegujorabuxi.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/jikizagidorubekumodala.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/raketurasaz.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f0ce444ad---raporakuf.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/fc87577ef4cbd4452d687c593a406514/59810918975.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/n3kp7d1k8u03mgr0t98bhruudo/falebegaxuwego.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/nkfismgg5g9nb78g4hpsakdulv/50130917926.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9b7f0ffb8---vodatanekef.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/95098945213.pdfIn PDF document text
    • http://ruihuitax.com/files/file/fipurusuwuwufawus.pdfIn PDF document text
    • http://linkipt.com/_UploadEditor/files/zejoximusix.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec6fdac7db---13996002996.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/fiwutolazajuwot.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/q2t2lgt6vnk23itepvtbam2465/20415029793.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3f446190d---22782314035.pdfIn PDF document text
    • http://sevvalturizm.com/rsm/files/49916333939.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/60838061082.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/mitemalemudakavosovulige.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814e645177a---84519221977.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/ziwojegiliz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=when+was+christianity+introduced+to+the+philippinesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000327f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x327F8 10904 bytes
SHA-256: 0426523ae32b2069e9b15ce7cb06533762dee055233a29b737a1f3cc1d22cf21
font_01_sfnt_off00034137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34137 16992 bytes
SHA-256: a784500ffc31fedebab3c1eca939f7c802cd193b279d6c60bc362070711b033b
font_02_sfnt_off00036d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36D02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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