Malicious PDF — malware analysis report

Static analysis result for SHA-256 37bf3c5a2db328d4…

MALICIOUS

PDF

48.4 KB Created: 2021-09-27 08:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d947ac5ffccabfd0356ea751ff7e4812 SHA-1: 733873d213374e792d36490154687efa23fa3931 SHA-256: 37bf3c5a2db328d4564d8096669b1c9f41732808fbb689a78641ad0bd5ecdd14
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier further indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5830

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=hard+reset+lg+optimus+black PDF link annotation
    • http://toyotacri.com/userfiles/files/34042980397.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/m4pqjpf0bre43dsrpvrq4aoejg/lofevi.pdfIn PDF document text
    • http://urgentcarepb.com/userfiles/file/11840373836.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/dukogav.pdfIn PDF document text
    • https://www.orthovision-lublin.pl/ckfinder/userfiles/files/dafavabiludagizova.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/pumuzu.pdfIn PDF document text
    • http://intemhathanh.com/img_duhoc/files/luzuniwuxo.pdfIn PDF document text
    • https://aldwalia.com/userfiles/files/13513443118.pdfIn PDF document text
    • https://quanticabtl.com/cms_2018_quantica/sgi_userfiles/userfiles/files/wovigifiralulowobi.pdfIn PDF document text
    • http://thietbibepnhahang.net/media/files/sibovaxizomidijiwir.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/datijapodixor.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/nemoxakufezupuwejizilo.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/25480953922.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/7569323846.pdfIn PDF document text
    • https://taiwan-tiaya.com/upload/tiaya_official/files/53212084976.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/36854301511.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/wodadologarazupilezipapig.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/61144301156.pdfIn PDF document text
    • http://ropesadventure.com/d/files/pitopepujubejebipazove.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/18208740679.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/zuludovorof.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/71705344439.pdfIn PDF document text
    • http://oldadmin.k12cart.com/media/files/38857181203.pdfIn PDF document text
    • http://prepearl.com/uploadsfile/simibesovoto.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/41795988276.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/26853557761.pdfIn PDF document text