Malicious PDF — malware analysis report

Static analysis result for SHA-256 1454b23afa5048c4…

MALICIOUS

PDF

61.7 KB Created: 2021-10-29 02:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: af24a474f05ef53aabbb6996f50474d1 SHA-1: 70ae0838a0bbd473c0419b3b536e599151cff1ba SHA-256: 1454b23afa5048c406cd0dc8bd4cd914796829483938e317a743a8b210f88118
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple distinct hosts, several of which appear to be compromised WordPress sites. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6913

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://infrive.ru/uplcv?utm_term=how+to+kick+off+animal+crossing+villagers PDF link annotation
    • https://mediaget.ru/userfiles/files/10444693625.pdfIn PDF document text
    • http://usa-ex.com/images/blog/file/73317258006.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/bugikures.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/05d064845a800ab13df731936928adb9/soxofenozozom.pdfIn PDF document text
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/2622309672.pdfIn PDF document text
    • http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/85057680481.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/famojumikesexag.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/47153935810.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/45085414797.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614e27241ff38---7755177029.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16150a3ffe9863---75230835663.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/dolv4lsc3h7s4prgmni21h5oks/61971323985.pdfIn PDF document text
    • http://gamecoast.by/uploads/files/55881597693.pdfIn PDF document text
    • http://saringkarnwood.com/UserFiles/file/rujaj.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/39303843993.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/46765048347.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/guborasarotevebis.pdfIn PDF document text
    • http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86036041994.pdfIn PDF document text
    • http://membranekeyboard.pl/_data/file/1572080255.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/62885960975.pdfIn PDF document text
    • http://fibertechnique.com/tmp/file/zutitadosupisuxidimolaguz.pdfIn PDF document text
    • http://dealershop.es/camarasegovia/userfiles/file/54518000676.pdfIn PDF document text

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