Malicious PDF — malware analysis report

Static analysis result for SHA-256 268c1b2efb86dbbe…

MALICIOUS

PDF

61.2 KB Created: 2021-08-01 04:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f81cb522713ed92d5dadc961deb0746e SHA-1: 4ed048299101556522206da271c38bb334d40c8a SHA-256: 268c1b2efb86dbbefe9b3c80d523762a6566fbbc66af94f41d93dc2a027b3af0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan distribution attempt. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely to host or redirect to malicious content. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7215

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 https://krisoc.ru/uplcv?utm_term=what+is+the+average+salary+of+a+market+research+analyst PDF link annotation
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/uninh45o2fq6tgvq443qb6aa20/98926868892.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/mo1e8a2ve7ito3fnkehp4s595h/sizeporoxasu.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16089b2babdce1---mizob.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f355ac70f8---zefelirenadesig.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607648ddc01bb---nuwagibuja.pdfIn PDF document text
    • http://zuche0551.com/upload/file/73823502326.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/uoevpnvi4scq3sq2hqise0upf4/rudigozowenabitikoxawitib.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/54696322389.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/1aea2e527b4d73a26290cf39f7d09438/73715590861.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/kupokonebamejojozex.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e64ff30f448---56469815313.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/avt0ai1ljub9iuprrb9n21hrv1/nuwewewutafaxoliwulali.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/65129213f28dc8e3740e64951a66f579/76909353644.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/47b50567fd081ed17623a432c2a5c0d4/femagewubapekubanota.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/trcnkerb8vj4tt91oulc871s82/ziratovuriditumatujato.pdfIn PDF document text
    • http://liyangah.com/Upload/file/53526053149.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/pulipukumuximutuj.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ec27a49d55e1a861046bffa98a15448d/fimox.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-7-27/20210727150948614842.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c78c9e249c---nukekaxiresekomiz.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/04e340b216da8d926144b65e873eedb1/60850532792.pdfIn PDF document text

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