Malicious PDF — malware analysis report

Static analysis result for SHA-256 193d4b3cfea52dca…

MALICIOUS

PDF

55.3 KB Created: 2021-09-23 19:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cee11b0b86d3526ebb3205009880a994 SHA-1: c3d52d28dbb54718e4d6f8b593987f5152ac023f SHA-256: 193d4b3cfea52dcab3306b15804719625d4dec8710158ba2181c5f62a6bb14d6
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous external URIs pointing to disposable hosting. The PDF document contains embedded URLs that likely lead to phishing or malware download sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4354

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=novel+sky+read+online+free PDF link annotation
    • http://espwireless.net/uploads/file/61552141081.pdfIn PDF document text
    • http://rayer.cn/d/files/movexosu.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/72867961019.pdfIn PDF document text
    • http://bradzo-ep.com/uploads/files/55364428667.pdfIn PDF document text
    • https://tauthuy.vn/upload/files/nuzuzugujefup.pdfIn PDF document text
    • https://mtestbd.com/assets/uploads/files/zewisutifemesud.pdfIn PDF document text
    • https://maintogelonline.info/contents/files/40266867772.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/vuwabapidakedaberawo.pdfIn PDF document text
    • http://vietnam-intraco.com/webroot/img/files/12199245890.pdfIn PDF document text
    • https://gilbertems.com/videos/file/mabimewesawumigav.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161483b7f50582---lefep.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/ganiligukelowukoropif.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/11040493106.pdfIn PDF document text
    • https://perfectsextherapy.com/public_html/userfiles/file/vinoxivezip.pdfIn PDF document text
    • http://dharkaninternational.com/survey/userfiles/files/vatikebijinekuwixed.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/9823479563.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/93952503231.pdfIn PDF document text
    • http://hnfhdc.com/UpLoadFile/2021091009504921663.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143cac1a8204---fevaferinerugozetat.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/povakudepo.pdfIn PDF document text
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/1653286981.pdfIn PDF document text
    • http://comitatoamiantovelodromo.org/userfiles/file/watafig.pdfIn PDF document text
    • https://www.adom.biz.pl/ckfinder/userfiles/files/71922902909.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/file/kezuvuwowuzojer.pdfIn PDF document text
    • http://iknow.pl/files/file/vinebolofonijadabifi.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/xaxufewewigijalin.pdfIn PDF document text
    • http://karaokejdi.com/ckfinder/core/connector/php/upload/files/49234633018.pdfIn PDF document text