Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e78f1c06fac789…

MALICIOUS

PDF

56.7 KB Created: 2021-02-18 03:44:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 38a7294d4b2f9fdb0046b2c8bad819d3 SHA-1: 000380cf44a64ac0eaf23b047c954787e5743d3c SHA-256: 99e78f1c06fac789f7c4aaed7482ecc4c7ebe46315b3fd0803530b80aaf603e2
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 potentially malicious domains, suggesting it acts as a link farm or phishing lure. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a high volume of links on disposable hosting, further supporting its role in directing users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8430

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://jottigo.ru/strik?utm_term=let+the+devil+take+the+hindmost+meaning PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379489/normal_601718d141204.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/Jgiibrk/free_editable_lesson_plan_template.pdfIn PDF document text
    • http://prizinsta365.site/cu2c2o4_nombre_qumico_para_sal_de_mbhma2.pdfIn PDF document text
    • https://cdn.sqhk.co/rasirise/eEXhcon/other_forms_of_government_issued_id.pdfIn PDF document text
    • https://cdn.sqhk.co/puzokopu/itjchh3/70807165185.pdfIn PDF document text
    • http://fruktovik.com/milulogibonijelejatmwei5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414871/normal_5ff5a33ba4e60.pdfIn PDF document text
    • http://appless.space/fuvoxatoluryy27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390081/normal_600e0c8d2f632.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503767/normal_6019c900bbd0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427079/normal_5ff5ddefa0ec5.pdfIn PDF document text
    • http://tuguxanofa.iblogger.org/druid_diablo_2_guide.pdfIn PDF document text
    • http://homebig.space/bexigiviputujesuviwozalij3gfir.pdfIn PDF document text
    • http://ketibenugato.22web.org/alain_soral_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/acute_prostatitis_treatment_guidelines_2012.pdfIn PDF document text
    • http://revuzulikasulo.epizy.com/84777163061.pdfIn PDF document text
    • http://bidemuv.rf.gd/attendance_sheet_excel.pdfIn PDF document text

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