Malicious PDF — malware analysis report

Static analysis result for SHA-256 85a7e736c3006d00…

MALICIOUS

PDF

75.1 KB Created: 2021-01-13 17:11:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 23379a4e7024fcc62425f859b5a7361a SHA-1: d5ed7b63dc35cf40508a8371279f1c234f195219 SHA-256: 85a7e736c3006d00515ca58a4cee5f9d41f01675931ba8ac31889ad88c85d17f
66 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/aws?utm_term=causas+del+cancer+de+utero+pdf PDF link annotation
    • https://cdn.sqhk.co/madagijoj/lEjgdij/93050980228.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/ehcRjgY/rutuzikom.pdfIn PDF document text
    • https://cdn.sqhk.co/zokasejiz/ea3iejc/55089593769.pdfIn PDF document text
    • https://cdn.sqhk.co/xizowabik/miaggXA/super_placar_2020.pdfIn PDF document text
    • https://site-1176887.mozfiles.com/files/1176887/recycler_adapter_in_android_kotlin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5fb5e42718407.pdfIn PDF document text
    • https://cdn.sqhk.co/wumidimux/hR2jczx/30119227407.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421214/normal_5fc4c3190b84b.pdfIn PDF document text
    • https://site-1174542.mozfiles.com/files/1174542/booyah_burgers_and_bites_specials.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovusig/QhbLhb0/skater_girl_aesthetic_outfits.pdfIn PDF document text
    • https://site-1171574.mozfiles.com/files/1171574/neuschwanstein_castle_3d_puzzle_assembly.pdfIn PDF document text
    • https://site-1167978.mozfiles.com/files/1167978/best_buy_xbox_series_x_launch_day_stock.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/shingles_vaccine_age_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/chatrapathi_tamil_movie_song_masstamilan.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/dbf_file_format_busmaster.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
    • https://medlineplus.gov/spanish/cervicalcancer.htmlIn 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_off0000e76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76C 5052 bytes
SHA-256: 58ef983aff2095362b5b568e7680ec0c7e5f984784231d83ab71fe7ec3f1586a
font_01_sfnt_off0000f8a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A5 11480 bytes
SHA-256: fc5d85355615d83c7954e3e89313359b0570da63c2f4ba51ac569d8fd56689d0