Malicious PDF — malware analysis report

Static analysis result for SHA-256 77923e2ff205aee2…

MALICIOUS

PDF

63.7 KB Created: 2021-09-19 19:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: aed57a7079789f95bb0238832a075dc5 SHA-1: 73ba63bfda907308eabccc3e82eba402a61098be SHA-256: 77923e2ff205aee2c0174d6d9e4e48d72105183e64d1b3f5a5a781ff28c25b98
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content. The presence of embedded JavaScript, detected by ClamAV as Pdf.Phishing.Trojan, indicates that the document is intended to execute malicious code, likely to download further payloads or redirect the user to phishing sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3846

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=cemu+super+mario+3d+world+download PDF link annotation
    • https://fetogram.ir/images/upload/files/tifotujamisetedarizewafi.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/nusitisoj.pdfIn PDF document text
    • http://cssh.es/img/file/getanoxijufejo.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/kunax.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/4233697b6c6286ef90099242b36b4e9f/ketixet.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16136dc1b42706---57823528635.pdfIn PDF document text
    • http://dezis.ru/uploads/files/javalazudog.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139bb9f64b42---daxezakunozupefulixe.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/37720149494.pdfIn PDF document text
    • http://3sdent.com/upload/files/degupozuxidazuti.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/f24128f905c243d5d5cec9d07876412b/wikokaniraru.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/sogekivezuvesewodeg.pdfIn PDF document text
    • http://telecycling.info/files/file/rabalidunapokepolojepemi.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/xuwurekisuzanasi.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/wilelifatuminivepifet.pdfIn PDF document text
    • https://sowlindia.com/userfiles/file/22474247517.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/pivisunupimawafafo.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/8750827698.pdfIn PDF document text
    • https://banerjeetourspecial.in/ckfinder/userfiles/files/surigininivunonevukak.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/f02597566ce5f501422687e6171ec06d/manurusakofupetutawuxiras.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161403d7a33446---92633129438.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/42448047296.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/sinozasuwekofowo.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/8720070643.pdfIn PDF document text
    • http://logicamail.it/draft/media/71894728940.pdfIn PDF document text
    • http://chengzechem.com/upload/files/77607796533.pdfIn PDF document text

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