Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7bf54c72ddde27f…

MALICIOUS

PDF

54.0 KB Created: 2021-03-24 10:32:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c07dcd68c8c287dbd1f5d94bc49e4da5 SHA-1: cb8cf3e3e848ded48815ba20036e8d6d85975cc0 SHA-256: f7bf54c72ddde27ff66c2e751ed83fabe4a0bf09420ce96283cb302aa8268adc
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and ML classifiers. It contains multiple embedded URLs, with several pointing to suspicious domains that appear to be part of a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for SEO-optimized links, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6563

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://baarspo.ru/award?keyword=difference+between+davis+and+ackerman+steering+gear+mechanism+pdf PDF link annotation
    • http://my-favshopc.online/bsf_full_form_salary44dz6.pdfIn PDF document text
    • http://bupetud.xyz/boundaries_worksheet_for_parentskjlbc.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/lBjahyi/gravity_full_movie_netflix.pdfIn PDF document text
    • http://guitar.su/modeling_agency_company_profileuzjcv.pdfIn PDF document text
    • https://cdn.sqhk.co/sobetevod/Xifjfhe/united_mileageplus_explorer_card_benefits_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/iifemha/hitman_agent_47_movie_300mb.pdfIn PDF document text
    • http://onenature.space/autocad_inventor_trial_software_free_downloadal2en.pdfIn PDF document text
    • https://cdn.sqhk.co/gumakulex/Yjghast/royal_family_news_update_today.pdfIn PDF document text
    • http://siteznakomstv69.space/kanukutelexarumiredazgcu2f.pdfIn PDF document text
    • http://grenkasalo4.xyz/40736072368k1gem.pdfIn PDF document text
    • http://help-copyrighteamservice.com/how_to_edit_a_photo_using_paintsx694.pdfIn PDF document text
    • http://ch-redirect.icu/mumonudvnjlz.pdfIn PDF document text
    • https://cdn.sqhk.co/vujaderaz/gfhejd3/firefighter_emergency_rescue_hero_911.pdfIn PDF document text
    • https://cdn.sqhk.co/gabebutiz/ePhdMjg/libertango_sheet_music_violin_and_piano.pdfIn PDF document text
    • http://bathforlegs.xyz/zugetapovekugadagomoctc85.pdfIn PDF document text
    • https://cdn.sqhk.co/fixakozumad/hchaDgc/guide_book_of_mathematics_class_9.pdfIn PDF document text
    • https://cdn.sqhk.co/loxosefivipo/fh0ghre/vintage_racing_motorcycles_for_sale_usa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ddab653-ab05-43f4-9caa-44a448cb66eb/5th_grade_common_core_math_standards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c109e5-7978-436d-96d6-fd43b52418db/ruvuzozej.pdfIn PDF document text