Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b9623d2609caf04…

MALICIOUS

PDF

79.8 KB Created: 2021-07-02 12:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4ad7f00a728844e9af3613e658fdc491 SHA-1: 77b15e85383050cd1a35231f9582f24549e23edd SHA-256: 3b9623d2609caf044cf739deaef061ba70a8bf78a64a38c93771bc2f0af776d9
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF that contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting. The ClamAV heuristic identifies it as a phishing trojan, suggesting the links are intended to lead users to malicious content. The PDF structure and link farm behavior are consistent with phishing lures or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3498

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://pistant.ru/uplcv?utm_term=words+with+p+and+q+in+them PDF link annotation
    • http://nocleginaplus.pl/uploads/userfiles/files/bameg.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/dasaboxevokisubel.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/45110370924087497603e5135838673c/37784392938.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/2fcccaa91d717551fdbbec0d67207514/xiwusanajevanakagex.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/gajizeginum.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/94583582233.pdfIn PDF document text
    • https://opsclown.it/ckfinder/userfiles/files/tagoxiwukitiko.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/wosixajap.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/66442395329.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/86897032144.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/5f5973juqq9ckmht4eo9fceu15/42667937834.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/dutesepotidisade.pdfIn PDF document text
    • http://wilkinsconnection.com/clients/9/94/94ba1e7d864c5c8af3bb481f5f9f31de/File/71218739292.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077f28f1fd0f---kinodukuv.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65258862298.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/2a2a5dd41c966c153c7b1b71c05f18a0/nezes.pdfIn PDF document text
    • http://mertlakustika.cz/images/pages/file/gididagikotizi.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/63427664379.pdfIn PDF document text
    • https://giasusinhvien.net/upload/files/nibuxezolonidizuliriwu.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606e7c3a8ab33---foxazimijoped.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/ruvifimoxebofodukanoxuj.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b80382e306f---fekivufumoguluxa.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/xebuw.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/segiximuzikidikafes.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609580c7ed361---golomibufopofesaxom.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/jugiremifixikafe.pdfIn PDF document text

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