Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cfe6fd9301c042e…

MALICIOUS

PDF

75.9 KB Created: 2021-09-02 11:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8bfc3ffcc87b497dd175f15055a5d7b4 SHA-1: 1ea08fa82274b524570547ee889b53c6a7eb93b9 SHA-256: 9cfe6fd9301c042e196e0ab93dbf8aab7784680c4e678dab5cf2afb1d76e5d08
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely leveraging a PDF exploit or social engineering to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://cesurmakina.com/userfiles/file/fufowofe.pdf
    • http://centreforeffectivecoaching.com/media/file/60056432260.pdf
    • http://beautybybelief.com/admin/images/file/66505583912.pdf
    • http://boston.pl/fck_pliki/file/21842105187.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e333e133c73---bunolodob.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db469002fde---lodufowanesonupaboxenaxo.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16116050a999dc---34860612442.pdf
    • https://fultoys.com/userfiles/52514907040.pdf
    • http://schule.havonix.com/ckfinder/userfiles/files/kanilewalamonapewar.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/uk5io1vlnmb5tn74jd19u0v3u2/bunuvurusonolosikuf.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/ata7r04023b0at6tujla6e8hm7/40565314800.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1610f883f87cb0---gaguze.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b8fd6605b47---popedime.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5cba731ebe---10916845993.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/hqnimm58ckge3rhf69b780ho5e/90616159138.pdf
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/5311767463.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/8kj2d02m6gvvscm7gfgvksbiv1/gajoloredukasapudapisita.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ac943fd3424---labokimemalagedowukoxufit.pdf
    • https://atraba-holding.com/userfiles/file/92943553903.pdf
    • http://mpti.ru/userfiles/file/44569061462.pdf
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/vatabavarudaripiwobare.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/m3o7ddgntp5kfeq2r4ehtin8i1/85871077759.pdf
    • http://mebell-city.ru/ckfinder/userfiles/files/fuvulodakiborovenir.pdf
    • http://meruzhankhachatryan.com/app/webroot/files/file/81136170150.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=antes+del+fin+ernesto+sabato+pdf+descargar
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1bf.bin
a02e07259b8c4d28d8fe8dde7e4c3bcb79e1961a3fa7c48405bcb808603bf9ad
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1BF 17884 bytes
font_01_sfnt_off0000eef6.bin
b36ba7b336d66d2c56509c5f1cf4ced538045802efd3ed3fd8a4663d656ca868
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF6 10916 bytes
font_02_sfnt_off000107f4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107F4 16792 bytes