Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe456f197371e39…

MALICIOUS

PDF

53.9 KB Created: 2021-09-17 02:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3e7da7c0bcdc1b6ccdf2ddd816059e3b SHA-1: 32c7b81dcff81486fb7c3bcf8f393215b43fbb57 SHA-256: 0fe456f197371e3935ee9d4de09095710e192bb8d7b70763e0239ee063acdf88
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to various domains. Several heuristics indicate the presence of a link farm, including PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM, suggesting an attempt to obscure the final destination or leverage compromised infrastructure. The primary purpose appears to be redirecting users through these links, likely to phishing pages or malware download sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4912

Heuristics 5

  • 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
  • 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://bsl-trans.ru/admin/ckfinder/userfiles/files/zijubepasokatazasumemuwiw.pdf In PDF document text
    • http://nbnjl.com/userfiles/files/53547010872.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/59188967571.pdfIn PDF document text
    • https://yaofangpeixun.com/upload/files/41354275472.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/84433072640.pdfIn PDF document text
    • http://bbbo.handyfriendship.com/upload/files/voropumit.pdfIn PDF document text
    • https://www.esfa.bg/root/ckfinder/userfiles/files/kesadurabarixawebuger.pdfIn PDF document text
    • https://unosms.us/userfiles/file/42276522143.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210907090637.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140ceca5da05---bipigaj.pdfIn PDF document text
    • https://kaparatt.com/images/File/juxasiwija.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/fapuxifekoti.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/c30952e0835bb735919aed92f68f2d5a/ladumatupi.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4d04e8445---96068561724.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/wolanuzeno.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/fc979c993b4d54fbfec3dd1597c211bc/mixinelajatisadulude.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/81498720155.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/degigapefab.pdfIn PDF document text
    • http://architectureanddesign.it/userfiles/files/82278449544.pdfIn PDF document text
    • http://dhleisure.com/ckupload/files/13820220065.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343490ca524---gapil.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/e4igiroc2q5jsn4en1nvjbson5/serovawukorawimelep.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/zonubotabilarejanuz.pdfIn PDF document text
    • https://cemb.ca/upload/editor/file/fuxes.pdfIn PDF document text
    • http://flightshop.jp/images/blog/file/lujorotugunaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=tap+tap+shareit+downloadPDF link annotation

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