Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c754744128298c0…

MALICIOUS

PDF

61.0 KB Created: 2021-08-13 10:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f3a0afbcf14a807dad13f32c8365e8e9 SHA-1: b3e1a354c62b5d7c1e00e0377113592dd0390c0a SHA-256: 3c754744128298c052e2556f3d560c113d3d2520a53ce3018e3f70474403382f
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and other disposable hosting sites. These links likely lead to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6616

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://west-holding.com/userfiles/file/35000426894.pdf In PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/gioi66adj6fkcv3d568193a9s4/pugivonujufefapizezo.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/a5aced1a73127ec6b62c2127436252c8/57421294967.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/snsfikqk1jlqcrb7npb4ufetr2/gasigiwavozese.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/lesutozefi.pdfIn PDF document text
    • http://mtsp.by/userfiles/files/zajepodajez.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/36b1a80515eaf5c6f61abfb1eb494bf5/dilukoseg.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/soroxibowapak.pdfIn PDF document text
    • https://viettrungson.com/media//Files/xoveniwexixojulewasa.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/29176570964.pdfIn PDF document text
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/94d6abcbeff91ed247ef7a427e330a6f/56136819525.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/goxagu.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/31877808667.pdfIn PDF document text
    • https://suksesunited.com/contents//files/50897635177.pdfIn PDF document text
    • http://sharise.net/Uploadfiles/files/jasexenokuv.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd39f9a00c---ritezebuj.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/61066977498.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/c7565487506ee67191383c50d3e469d1/femifezoromoka.pdfIn PDF document text
    • http://orkoien.com/userfiles/files/86023454961.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/c74ce2890f65848a2452cbb153a4ef1f/83967032562.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68ed0d9e97---93059125601.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/kih3rn4beegec84frls16lnuoa/xigonopusonatevime.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=problemas+verbales+de+multiplicacion+para+tercer+gradoPDF link annotation

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