Malicious PDF — malware analysis report

Static analysis result for SHA-256 f400586a44d13d85…

MALICIOUS

PDF

76.5 KB Created: 2021-04-14 12:28:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: bfe25c2d22649c4d197b50467cdd9550 SHA-1: 41cb5916456d9716983ca56f335f347a096300ad SHA-256: f400586a44d13d858514be2b740d3022dc9f77703a3f8da0d2f001bcb22e186d
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a high number of embedded links pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier strongly flagged this PDF as malicious. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further support the conclusion that this document is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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://pelibifir.ru/strik?utm_term=is+crossfit+good+for+fat+loss PDF link annotation
    • http://drnextact.xyz/hypercube_evolution_build_guidepaf4x.pdfIn PDF document text
    • http://nijewogifuzazi.mypressonline.com/salem_oregon_map.pdfIn PDF document text
    • http://difozoxezepi.getenjoyment.net/approaches_to_teaching_and_learning.pdfIn PDF document text
    • http://figuxovutofid.mygamesonline.org/gagudadobo.pdfIn PDF document text
    • http://fejiximodanu.mygamesonline.org/bbc_compacta_class_11_english_answers.pdfIn PDF document text
    • http://sokixatov.mywebcommunity.org/furosemida_efectos_secundarios.pdfIn PDF document text
    • http://fituxem.sportsontheweb.net/56124916403.pdfIn PDF document text
    • http://refazali.mygamesonline.org/titujibatekimokularepute.pdfIn PDF document text
    • http://duplicwcnj.space/191014934890bzby.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/assurance_and_insurance.pdfIn PDF document text
    • http://laruvunowos.22web.org/zurerekalunileserisi.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/pewuxoxuwivadusavel.pdfIn PDF document text
    • http://spiritstudio.ru/the_yearling_movie_1946_castzzjc1.pdfIn PDF document text
    • http://repair-kvadrokopterov.ru/cisco_flexconnect_switchport_configurations532y.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/9fb509e3-8e2c-4eec-bce3-5dd2c6186be3/jump_force_all_dlc_characters_list.pdfIn PDF document text
    • http://vexorulutukozov.rf.gd/how_to_enter_commands_in_autocad.pdfIn PDF document text
    • http://jutejuviwolopis.rf.gd/vcredist_x64._exe_free_for_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad3b4d2-2db0-4235-a10a-24758e24897c/bible_sermon_outline_on_thanksgiving.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa445199-c8bc-4f87-acd4-df1727046c9e/calories_in_el_pollo_loco_flour_tortilla.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/mibevisoditokalibakef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e18f020-cb81-467d-bf7f-f3efef083d4d/craftsman_208cc_tiller_carb.pdfIn PDF document text
    • http://vipuzala.myartsonline.com/the_holy_bible_niv_download_free.pdfIn PDF document text
    • http://sorisavitekinuj.onlinewebshop.net/10812696934.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_off0000ee26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE26 5128 bytes
SHA-256: eee7f70a73bac71ec9af485414b277f3d7661876205948ab5c453892bf7b9e50
font_01_sfnt_off0000ffa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA3 10756 bytes
SHA-256: 06c72ff9b9eaaaf921ad1e3902b36b159d03fe428d2dedd1f4845d57f6a76a74

Open this report in the interactive analyzer, or submit your own file for analysis.