Malicious PDF — malware analysis report

Static analysis result for SHA-256 35003ce0ef3dcea2…

MALICIOUS

PDF

83.4 KB Created: 2021-09-22 10:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6c4ba7d51f8ef4b690129068a45189b9 SHA-1: c1a223bad90270aa01ed520ab8c41c34a07876cd SHA-256: 35003ce0ef3dcea25a5d03743e26b14a1657e4cd81a933cacbffdec8833a80c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is unreadable, but the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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.
  • 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://condosworld.com/abisol1/userfiles/files/gidolitawononel.pdf In PDF document text
    • http://xn--80aafbladvtgxneccoge3bt.xn--p1ai/pict/file/fadezule.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/betevodaji.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/98989065716.pdfIn PDF document text
    • http://pincodehub.in/userfiles/file/wewowufixukovajefiji.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/161448e2c8a5be---78691363737.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16133631db1232---nefar.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/rililujenabatujaj.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/k2r0sf3tnu5phkd2srokrmgnoe/jipozupegofemikaza.pdfIn PDF document text
    • http://coolscape.info/images/files/18700698025.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user//file/_0888941001631054307.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/nexotofop.pdfIn PDF document text
    • http://nepalbestcargo.com/userfiles/file/87494578016.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/ligimigowapumolamutomi.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613a39451e7d3---koruvigaduxilumiluzerorev.pdfIn PDF document text
    • http://jn-zhsc.com/upload/21338879158.pdfIn PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/pavopolimon.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/peduxoni.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/11171238086.pdfIn PDF document text
    • https://marblo.marblobaths.ph/app/webroot/img/files/xawiludutusezaxeriw.pdfIn PDF document text
    • http://zeci.nl/im/image/76451652933.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16140452e979d5---23964600220.pdfIn PDF document text
    • http://risme.vn/files/xazotewulevimus.pdfIn PDF document text
    • http://vitajeans.com/ckfinder/userfiles/files/78809454343.pdfIn PDF document text
    • http://aftp.bg/userfiles/file/39355161685.pdfIn PDF document text
    • http://managhantasala.net/mailuserfiles/file/12487015958.pdfIn PDF document text
    • http://dotykbylinky.sk/_subory/subory/wofimaregojafuruta.pdfIn PDF document text
    • http://divodizain.ru/ckfinder/userfiles/files/banoxiwezuposuvebaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=best+offline+music+player+for+pcPDF 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_off0000e015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE015 17744 bytes
SHA-256: f251138aede76396e9f354c5efac361583467ef2a75c033a2513dbe62777aab0
font_01_sfnt_off00010e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12665 10908 bytes
SHA-256: ff84e87599a0f3ca2f9d5f63e8d0461295c327ffca7eec353cf0f25a0cd983f9