Malicious PDF — malware analysis report

Static analysis result for SHA-256 28a7357f965ee16a…

MALICIOUS

PDF

51.2 KB Created: 2021-09-06 18:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a65d06e64d9162c75ed26df256fb4ca4 SHA-1: 54c6f1812477012d58cc83f204c50169270583cb SHA-256: 28a7357f965ee16a2fd91249790ef1e416432ac4d88154f1a788d51c8f65af21
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6227

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://pixomot.ru/uplcv?utm_term=export+excel+to+pdf+vba PDF link annotation
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca6c7848e0---46505133763.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/48410544039.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/63986148426.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085eeabcce8b---bilireladenetid.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a684832db---8934180397.pdfIn PDF document text
    • https://marupyara.com/fotos/userfiles/file/dotuguregonebinopugume.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-4-29/20210429194540968586.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/b7ff158876a34cd9a2bfc3c20cf16dec/petej.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/e47f3d8c6acd2ef110cc65992127c034/90722400168.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/0b9c92216b967bdfee4c4dd05cdab145/62276793569.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d4609dadd---63649783644.pdfIn PDF document text
    • http://amandamaitland.com/images/file/ketivok.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/01af88edd63d9ff336e6706c81c0dfa6/66899518891.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/45akbtieah581chjro2gdikg38/sevamogiliguvuwulomexi.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210905_143633.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/kizusefos.pdfIn PDF document text
    • http://auapp.ch/userfiles/files/kakutebiratovuxeguxogil.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d3b26b3ac---86860673837.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1524bd044---44241963346.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/jizijagizuzetamimefuxo.pdfIn PDF document text
    • https://keongracun.org/contents/files/wagibovesamokexajikodogip.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210809/0041511339.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/11eb5257d4f30ab7488e985c30a6ba9d/6045945273.pdfIn PDF document text

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