Malicious PDF — malware analysis report

Static analysis result for SHA-256 c57e3cc7ca3e306b…

MALICIOUS

PDF

57.2 KB Created: 2021-09-21 16:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5ca6af4334a39b954e5b277bbfe64046 SHA-1: 4a5f41bf08e8a682ae49c61255264b61813be9c6 SHA-256: c57e3cc7ca3e306b40c72fda0f7b360772b579386a99888b6dcd0c223cde98c6
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to various domains, suggesting a link farm or phishing attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a high number of distinct hosts, reinforcing the link farm hypothesis. While no scripts were extracted, the presence of external URIs and the overall structure point towards an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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://abbeytraining.net/userfiles/file/75756088973.pdf In PDF document text
    • http://kompassztuki.pl/Image/files/98912211078.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/50477646244.pdfIn PDF document text
    • http://mamitobe.ru/files/file/nogabazapuni.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b80005b31c---32223135711.pdfIn PDF document text
    • http://www.workbythai.com/admin/assets/images/vigurozuboxit.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210905152830.pdfIn PDF document text
    • http://tcihk.com/userfiles/vupim.pdfIn PDF document text
    • http://weforyou.it/userfiles/files/52842301160.pdfIn PDF document text
    • https://wangwangcamp.com/uploads/files/202109020355322733.pdfIn PDF document text
    • http://vuonlan.vn/data/upload/files/vazakul.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/67862686692.pdfIn PDF document text
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/66549195766.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/vipasowadonizenowemebup.pdfIn PDF document text
    • http://tencanpowder.com/d/files/giwus.pdfIn PDF document text
    • https://phucatgarment.com.vn/ckfinder/userfiles/files/81523807900.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/doketimabedexaw.pdfIn PDF document text
    • http://covina.crazyrockinsushi.com/uploads/files/13242710872.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202109121305032474.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/53673256570.pdfIn PDF document text
    • https://maurinet.com/userfiles/file/labarorelipege.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/19951239010.pdfIn PDF document text
    • http://e-district.org/userfiles/file/rumiborapi.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/vufoko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=fighting+tiger+liberal+mod+apkPDF link annotation