Malicious PDF — malware analysis report

Static analysis result for SHA-256 59684749e250a7e9…

MALICIOUS

PDF

81.0 KB Created: 2021-03-11 07:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7fafe1dd7c8bedc1c3482973e1c0dc99 SHA-1: 8bdd4ce3023a43b9f6688d3291ba8720cd569d02 SHA-256: 59684749e250a7e9f70814799940b4cc85380a37d7e94c4bca19f80593a796d5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, characteristic of a link farm, with one identified URL flagged as malicious. The ML classifier strongly indicated maliciousness, and the document's structure suggests it's designed to lure users to potentially harmful websites. No scripts were extracted, but the PDF's nature points towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=regla+de+acentos+en+espanol PDF link annotation
    • http://bitalotava.scienceontheweb.net/zapekote.pdfIn PDF document text
    • http://raraveluwogevuw.mypressonline.com/babed.pdfIn PDF document text
    • http://fabimepela.22web.org/bd_hsc_result_marksheet_2018.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/remington_700_adl_bdl_difference.pdfIn PDF document text
    • http://numusuri.22web.org/what_are_good_exercises_for_soccer_players.pdfIn PDF document text
    • http://tawaguf.scienceontheweb.net/what_is_hindi_meaning_of_inorganic_chemistry.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/9b3e4919-c031-4b3b-8f28-8075707be001/project_management_professional_certification_program_pmp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc04f24e-a18d-455f-934d-c93d53bcec73/45145213126.pdfIn PDF document text
    • http://papujov.epizy.com/just_the_way_i_am_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ade8279-7aa5-4b10-a2b2-09e13d619047/english_speaking_lessons_for_intermediate_level.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/353353a9-7788-4ed7-96f6-f7178f210df3/jugejadepivaxun.pdfIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_895e60972ef442ec916a78d792912636.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca9e297a-40a2-4918-9c75-6d47814436ed/90622812206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47071112-9eaf-4396-bda5-9144cc76b64f/air_force_ranks_us_army.pdfIn PDF document text
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_c08b0670856b4ae0bcb00e789fcccf1b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/17c18bef-5b35-4fb5-9f7a-2283a3527c97/does_disney_plus_have_all_the_percy_jackson_movies.pdfIn PDF document text
    • http://lawaxisagiwog.atwebpages.com/54299233240.pdfIn PDF document text
    • http://nebejobibaveb.epizy.com/anjana_song_2019.pdfIn PDF document text
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_72a0f469a0244d87a95fa85ec034fe50.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6bc7aaa-a451-4c3b-be81-4a255d6a76e2/bowflex_treadclimber_tc10_used_for_sale.pdfIn PDF document text
    • http://nizalag.rf.gd/despacito_violin_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a70a626-2a7e-4849-a3fb-b4636a58bbd4/tafetusipudujedekobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08c68d7a-e6aa-4d65-a02b-5809425d54e1/60150369291.pdfIn PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_cc828fd2f47a4d34b66b16ced56fe3b4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f55637b9-565b-4b72-879e-81c1f5136320/bewadubur.pdfIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_10c0aac4f963430b83f889a8107dd52f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3799ff74-ebf9-4d96-b18b-32aa14befd3a/45243340258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5162b3f-dac9-401d-8bbd-b84424601516/21011992133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28452b3d-d01a-4fcf-90f9-2a0ede157455/dunkin_donuts_frozen_coffee_drinks_calories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3194185b-1077-4648-a7ef-ca45a5d922c1/how_much_is_a_cell_phone_ticket_in_california_2020.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_off0000fb4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4C 5152 bytes
SHA-256: 1750ce980b067b10bb7a6168f817846d174230e6b33f9ed29266c4663813ce57
font_01_sfnt_off00010cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEE 12632 bytes
SHA-256: 5110891736164ec33e04c83e2140ae0e115ae0df3e2f8f93b3cc3f3e050a3114

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