Malicious PDF — malware analysis report

Static analysis result for SHA-256 519a8e12028ab204…

MALICIOUS

PDF

58.2 KB Created: 2021-10-01 04:29:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: bdabe34d6ae394c03b1fb70c98c36d15 SHA-1: 26d614d470fb218540f1a39033c7238e800e1103 SHA-256: 519a8e12028ab204f419435de1f536f4fcd1cc6bca3948432f9430de9273d085
124 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains numerous embedded URLs pointing to various domains, identified as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates that the PDF is designed to host many links on disposable domains, a common tactic for phishing or distributing further malicious content. The ML classifier also flagged the PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5340

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://gamecoast.by/uploads/files/81619772760.pdf In PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/kuzezadedinapifelepukom.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/65854203779.pdfIn PDF document text
    • http://slkuang.com/v15/Upload/file/20219213368103.pdfIn PDF document text
    • http://labonguyenhoang.com/img-chamthi/files/xowuku.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/70423741246.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/42882845151.pdfIn PDF document text
    • https://mogilew.ru/userfiles/file/komupitegejepujixegexi.pdfIn PDF document text
    • https://ruta.hu/ckfinder/userfiles/files/15169038091.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/zaketobu.pdfIn PDF document text
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/xiwodaletulumosaluparel.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/vasuletamobopopuzotig.pdfIn PDF document text
    • http://noithatvietsky.net/media/ftp/file/94867419880.pdfIn PDF document text
    • https://mosaicopeoplecorporation.com/ckfinder/userfiles/files/2499785669.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/gikulenuko.pdfIn PDF document text
    • http://prime42.ru/userfiles/files/malanub.pdfIn PDF document text
    • http://knx-shop.ru/admin/ckfinder/userfiles/files/nazebedofufajetokigu.pdfIn PDF document text
    • https://theurbanthinktank.com/files/zefifudebelazesipoxem.pdfIn PDF document text
    • https://edex.co/userfiles/files/50388957076.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/gamovowademewifezezifujus.pdfIn PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/16799631554.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/jojozewafotaxofaxijinaj.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/13051540754.pdfIn PDF document text
    • https://arerp.kr/data/file///15252914585.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/7088548339.pdfIn PDF document text
    • https://losaltos.com/wysiwygfiles/file/latipedugajumebawa.pdfIn PDF document text
    • http://upasamed.org/Content/uploads/files/67377458238.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=action+words+beginning+with+bPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB241 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1