Malicious PDF — malware analysis report

Static analysis result for SHA-256 3729fb66ce0385a3…

MALICIOUS

PDF

67.8 KB Created: 2021-05-02 00:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: de2992da6a88a3c9464bb0114625c798 SHA-1: 2cf07a2aee3049fd3db7f6883806328e946579a7 SHA-256: 3729fb66ce0385a3eb6d6b9bb3cbf728f83b823dce2b2b88d436ec989e84e6d6
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to disposable domains, designed to act as a link farm. The primary malicious URL identified is `https://midufefew.ru/strik?utm_term=wd+tv+hd+media+player+alternatives`, which is likely intended to redirect users to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9470

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/strik?utm_term=wd+tv+hd+media+player+alternatives PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460045/normal_6068e9d57ce83.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460975/normal_5fc96a8ed914a.pdfIn PDF document text
    • http://shop-onlain.fun/wenzel_monarch_tent_instructionsmr4g3.pdfIn PDF document text
    • https://cdn.sqhk.co/muruwake/hcgdEEM/journal_el_khabar_d_aujourd_hui.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426688/normal_5fd27158a2b1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490974/normal_603b97c7ca04f.pdfIn PDF document text
    • http://rifimakegezibor.22web.org/domizuzanefene.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/zhhLrja/liverpool_latest_transfer_news_update_today.pdfIn PDF document text
    • https://cdn.sqhk.co/pubamegumox/whcgchi/spider_solitaire_card_game_free_online_aarp.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/hilijAQ/susuxetubolamodifewom.pdfIn PDF document text
    • http://reduslim-buy.site/39035223657xwgzi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393180/normal_5fe3fbe2ed800.pdfIn PDF document text
    • http://slmit.fun/iot_farming_applications8l74i.pdfIn PDF document text
    • https://cdn.sqhk.co/givikofuf/bWmlhaH/banufavatolebosifixadeb.pdfIn PDF document text
    • http://fimewot.xyz/277261129601fdce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459641/normal_602eddf9a5241.pdfIn PDF document text
    • http://limixawur.rf.gd/16234907757.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/723b495b-6222-41c3-b819-4250af259bf9/wurebizemimi.pdfIn PDF document text
    • http://pugetuwozijeso.rf.gd/introduction_to_sociology_anthony_giddens_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee17ca90-9ce0-4f7d-a379-7a9a8248328f/76478933291.pdfIn PDF document text
    • http://ludodugadigepez.rf.gd/zepifisaxefini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a8af7b7-5aa9-471b-8fe9-c5ee776b29fb/138_longwood_lake_road_oak_ridge_nj.pdfIn PDF document text