Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c29de19bc4b1e04…

MALICIOUS

PDF

74.3 KB Created: 2021-03-28 17:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f91f41a21964b4eec30a039a0a6fafa4 SHA-1: f455b3f111efe1f543ded23d20ee95b773a3bb74 SHA-256: 2c29de19bc4b1e047ea52d5e5f17c3568a5fb7e460ac1dcc21b08022915d48c7
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier strongly indicates maliciousness, and the presence of external URIs suggests an attempt to redirect the user to potentially harmful content. No scripts were extracted, but the overall structure and URL distribution are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/award?keyword=bearing+selection+catalogue+pdf PDF link annotation
    • http://kovafuwir.getenjoyment.net/pakufa.pdfIn PDF document text
    • http://gejedesoni.getenjoyment.net/how_do_i_connect_my_tp_link_smart_plug.pdfIn PDF document text
    • http://fukijuwevo.getenjoyment.net/sat_prep_courses_bergen_county_nj.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/mebutetaliw.pdfIn PDF document text
    • http://basumoxivor.sportsontheweb.net/sopowoguretujarabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444877/normal_6011c25f0becc.pdfIn PDF document text
    • http://bukapim.mywebcommunity.org/deadpool_kills_the_marvel_universe_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388293/normal_5ffd42d7ea0d9.pdfIn PDF document text
    • http://lezobul.medianewsonline.com/comptia_cysa_study_guide.pdfIn PDF document text
    • http://gagaxodaka.22web.org/waiting_for_the_barbarians_themes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470835/normal_6056708208dc5.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/bca03ad3-7dd6-470c-9264-8dc36d2a773b/delta_shopmaster_table_saw_s36_295_reviews.pdfIn PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_ed363439d0984b72b6ef04843d08d063.pdf?index=trueIn PDF document text
    • https://90138cf2-752b-46b9-a396-1872e0473e42.filesusr.com/ugd/02203e_70954941b340471bb5e0dda9d6d7d236.pdf?index=trueIn PDF document text
    • http://radizala.epizy.com/bse_odisha_9th_class_physical_science_book_download.pdfIn PDF document text
    • http://litasamixezan.rf.gd/8246687027.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/raraweb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4cb5592-5d5c-420e-bd96-03a882ca7630/mesa_boogie_dual_rectifier_roadster_head.pdfIn PDF document text
    • http://kikumofesokir.rf.gd/niklaus_wirth_algorithms_data_structures_programs.pdfIn PDF document text
    • http://tixofimisupabev.onlinewebshop.net/glandula_de_bartolino_anatomia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c30879a4-d288-4ac6-a422-85d669097de9/diresa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbaa4b6c-ff85-4f30-907f-5eec7d18292c/can_i_make_popcorn_in_my_ninja_air_fryer.pdfIn PDF document text
    • http://sifebitufol.onlinewebshop.net/human_resource_management_dessler_g.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecddfdea-674e-4038-a526-7ebbf982cd5d/19909096112.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_off0000e601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE601 5372 bytes
SHA-256: 5bd6c12e5118f5a1e2b10c91a6ba1e8eee6fbf1e0bb7bc326add7fdba806a07f
font_01_sfnt_off0000f859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF859 10316 bytes
SHA-256: 285abe8e8372ca6d8459d8a03a4a98603c478d210d54d4ae2af0f1fa9ede9f18