Malicious PDF — malware analysis report

Static analysis result for SHA-256 2333a0d585b4216a…

MALICIOUS

PDF

154.9 KB Created: 2021-04-18 03:44:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0e322d9ba57113d39a3606b5d0e47a26 SHA-1: d146e053d65f3599f682bc185939192389e37e55 SHA-256: 2333a0d585b4216ac3421d378cf7bfbc0dc1025aeb8346271f231838073d57be
66 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and utilize UTM parameters, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the heuristic analysis identified it as a link farm on disposable hosting. While no scripts were directly extracted, the structure and URL patterns suggest an attempt to lead users to further malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://jumiwimov.ru/strik?utm_term=rumble+fish+book+pdf PDF link annotation
    • http://jefuvumerusew.getenjoyment.net/benjamin_zephaniah_talking_turkeys.pdfIn PDF document text
    • http://bumufirila.mygamesonline.org/66073973044.pdfIn PDF document text
    • http://mamefumiwuto.mywebcommunity.org/green_function_boundary_value_problem.pdfIn PDF document text
    • https://cdn.sqhk.co/jevipugirofi/yhcxibj/real_police_siren_mp3_ringtone_download.pdfIn PDF document text
    • http://elerctum.org/i_o_psychology_textbookty5o8.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/cw9hcGg/real_steel_robots.pdfIn PDF document text
    • http://kusukeluwabe.mywebcommunity.org/applied_linguistics_books.pdfIn PDF document text
    • http://sy0n.icu/283513752116wjgg.pdfIn PDF document text
    • http://scriptbook.xyz/3d_planets_wall_stickersawukx.pdfIn PDF document text
    • https://duzonaxur.weebly.com/uploads/1/3/4/0/134012347/293621.pdfIn PDF document text
    • https://depujoseteg.weebly.com/uploads/1/3/5/3/135309287/derefuzizalorut_vivugaja_dozorugexuvun_walifoj.pdfIn PDF document text
    • http://fortuneo-enligne.com/gta_vice_city_game_password_freedund3.pdfIn PDF document text
    • http://heleogose.online/xosurox0obod.pdfIn PDF document text
    • https://fozuxuvaporoj.weebly.com/uploads/1/3/1/8/131856883/b5ccd789b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502246/normal_6069fbee223d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447436/normal_5ff0465b031ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385214/normal_6049ac73deb56.pdfIn PDF document text
    • https://xaxidotuviw.weebly.com/uploads/1/3/0/9/130968933/3d3c4ad0785c37.pdfIn PDF document text
    • http://sunshop.pro/81787043734phabb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421213/normal_6043572e94ebe.pdfIn PDF document text
    • http://save50it.info/el_circo_de_la_chola_chabuca_2020_en_vivou8lab.pdfIn PDF document text
    • https://cdn.sqhk.co/pibutuvopedu/6h1Dzcc/ben_10_generator_rex_heroes_united_movie_download.pdfIn PDF document text
    • https://dalatomim.weebly.com/uploads/1/3/4/3/134344090/7901173.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bowegasobufur.myartsonline.com/tobisipezifimomofiduxeja.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_off0002243a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2243A 5184 bytes
SHA-256: d199c6f57d628bea14968eb94a46ebf79b0c06b9894cc37fa35f7dd2f1dc1f80
font_01_sfnt_off000235bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x235BC 11176 bytes
SHA-256: fe8ba87fe15314a2cc74db88d9212f5cf7b05b634febf57a6105e963868d9175

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