Malicious PDF — malware analysis report

Static analysis result for SHA-256 2125185eaf1c063f…

MALICIOUS

PDF

60.9 KB Created: 2021-09-13 04:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 489cb4430583826494758665085f01c0 SHA-1: efdf72825d85161769643558b3294766917eb437 SHA-256: 2125185eaf1c063f490707d6d40ebc0f35317e97ebc19dc36cfb30ee3407c9dc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7193

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 https://irlanc.ru/uplcv?utm_term=how+to+install+pubg+xapk PDF link annotation
    • http://vonschickenfremont.com/uploads/files/36650598225.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a8409a3b56---wowubuzu.pdfIn PDF document text
    • http://ranch.pl/files/file/bivarabafetomer.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/15627234511.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/35295672435.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/jolazaroxuxenid.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e95b18e6d2---degedu.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161392d3676268---rigoxipur.pdfIn PDF document text
    • https://pvesc.vn/uploaded/file/fawovovowenokavexadawe.pdfIn PDF document text
    • http://rainhouse.kr/data/editor/file/2698610316130773364bb3.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/borekafukagexozajobipux.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/84235534505.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/85309956676.pdfIn PDF document text
    • http://www.jasfec.com/imgs/uploads/16679837440.pdfIn PDF document text
    • http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/lesazinigiterenagat.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/22428607925.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/valajodote.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132e25962904---27993712318.pdfIn PDF document text
    • http://goldenteriyaki.com/uploads/files/71797024589.pdfIn PDF document text
    • http://gonzagafood.com/userfiles/files/95088071228.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/zasijapatepijaxoraned.pdfIn PDF document text
    • http://telektrans.hu/editor_up/zejofenezoziserujimosa.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/fepela.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/bfd730276d4d0a4c1ee4c1d99c72cc17/dokugebi.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD182 10704 bytes
SHA-256: 1131642c0bf1a62635da99ab35fd317556e390bbea50ae345786ed27ca83da75

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