Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d378f0a750d561d…

MALICIOUS

PDF

88.7 KB Created: 2021-03-22 13:51:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ccb29ce9f28e5761e2ac11204068e957 SHA-1: abefcfb4d1e3fce065a59e1eb6e575c57e796be6 SHA-256: 3d378f0a750d561d351c54b115aeff31a887174e9acec56d9ae8df6bff019651
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing attempt. The primary URL, https://botokaw.ru/strik, is likely used to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and numerous embedded URLs indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://botokaw.ru/strik?utm_term=is+there+going+to+be+a+6th+gregor+the+overlander+book PDF link annotation
    • http://bizifemodefi.mygamesonline.org/80280241850.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/gibD5xL/can_i_speak_to_your_manager_haircut_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/aijgihe/grand_hotel_sunderland_phone_number.pdfIn PDF document text
    • http://napufokotipo.getenjoyment.net/indian_love_stories_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/CZhjhhy/78728802103.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/80731994798.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/dell_latitude_e7450_hard_drive_removal.pdfIn PDF document text
    • http://zupinuxuxodu.iblogger.org/lifibemumufavib.pdfIn PDF document text
    • http://zikewexer.scienceontheweb.net/city_of_thieves_book_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/icgh2hZ/wolof_phrases_amour.pdfIn PDF document text
    • https://cdn.sqhk.co/fezavomol/Shd0bij/madrid_zombi_2_apk_full.pdfIn PDF document text
    • http://tefuvawilutir.mypressonline.com/the_marriage_plot_jeffrey_eugenides.pdfIn PDF document text
    • http://korogesubelokut.mypressonline.com/94408538567.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/654ba8d7-b2ad-4998-aa9e-79ba7468b2f1/budidas.pdfIn PDF document text
    • http://danebusuji.onlinewebshop.net/yamaha_yas_207_review_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9bdb626-d479-444a-96c5-795f9a8dd975/76542748032.pdfIn PDF document text
    • http://nopugorib.onlinewebshop.net/jetenasimosajera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d433c8b-de4f-494b-bd18-40d107e25145/line_6_spider_iv_30_tone_settings.pdfIn PDF document text
    • http://ninefaniki.rf.gd/ncert_biology_11th_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82670014-b5ab-47cc-b022-00c53b128611/the_man_in_the_high_castle_season_4_wikipedia.pdfIn PDF document text
    • http://wuresuju.epizy.com/history_of_english_literature_books_free_download.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/viwanovizalitaraguzunekuz.pdfIn PDF document text
    • http://suwujidewo.rf.gd/dewalt_sliding_miter_saw_10_inch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85b62ee1-6533-43d7-8f2f-f1b40e1f0b2d/fubunukafujinizazofaz.pdfIn PDF document text
    • http://katevafitaga.epizy.com/10045278207.pdfIn PDF document text
    • http://dunobumuvoz.epizy.com/91672289078.pdfIn PDF document text
    • http://falafujofubopes.rf.gd/xejudiraxefaretunaf.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AF 5440 bytes
SHA-256: 671360e47d48cb5fbaa6d7cad0de7c170ca6756426cf7107ca282d7de494cae1
font_01_sfnt_off00012b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2B 12640 bytes
SHA-256: 9486f207050f0d1d35c92d54b07b127afcca02d4302f09d727acc6d9fed55210