Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8a2cbca286df04a…

MALICIOUS

PDF

91.5 KB Created: 2021-08-15 21:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d0f9162f06a13c41706a48b201c70916 SHA-1: ed3b274a11a1f5582bf89ff5a2dd2445e4cbde36 SHA-256: d8a2cbca286df04a2fab1adeb27715ee90fdc9152ce72f791da475e475c914e6
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to domains that appear to be part of a link farm, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML_NYX_PDF_MALICIOUS and ClamAV detections confirm its malicious nature. While no scripts were explicitly extracted, the structure suggests it's designed to lure users to external sites, potentially for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6903

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 https://denizlihorozu.com/resimler/files/nosepigew.pdf In PDF document text
    • http://21cedu.com/pds/userfiles/files/kokonemi.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/zeguporugetefakusim.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/zebidoluxojonepuwetoxidus.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cb4807ca069---gurazu.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/rekezivoxiwuviduparu.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/34917317504.pdfIn PDF document text
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/masovuwozobetumisube.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/mofazijizalepafurok.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/bojuzatewaditavez.pdfIn PDF document text
    • http://built.lu/userfiles/files/71787242350.pdfIn PDF document text
    • http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/dapegumebite.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sitexi.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2ff6c73e6---totoluxofuxi.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/pofisef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=calories+in+shredded+chicken+soft+taco+taco+bellPDF link annotation

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