Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4375207754802ce…

MALICIOUS

PDF

71.3 KB Created: 2021-01-21 14:07:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4ef61b3345c019bf338bf9b2011f609c SHA-1: baea336c8f22ccf2363e5fbdf42baf88500969b9 SHA-256: c4375207754802cedeaad782d172aff7877be412d4ccba948bca41ff48787ba4
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wb?keyword=action%20replay%20dsi%20driver%20windows%2010 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462992/normal_5ffcc5ed23861.pdfIn PDF document text
    • http://palejep.22web.org/24398141366.pdfIn PDF document text
    • https://cdn.sqhk.co/vapatibu/hyxXFCT/xituvesek.pdfIn PDF document text
    • https://site-1177329.mozfiles.com/files/1177329/scarfall_the_royale_combat_game_download_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/lukizigerex/Sl2rieH/dagurebegirabagezabopi.pdfIn PDF document text
    • https://zavetogodafewer.weebly.com/uploads/1/3/4/7/134709275/bovapefu-muxolawekido-tadilisenife-zenuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/mekekomubun/bwhgOjb/school_days_anime_plot_twist.pdfIn PDF document text
    • https://site-1176752.mozfiles.com/files/1176752/31333514983.pdfIn PDF document text
    • https://site-1195638.mozfiles.com/files/1195638/tugesifozonom.pdfIn PDF document text
    • https://site-1245980.mozfiles.com/files/1245980/free_printable_compass_rose_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379848/normal_5fd930c9ac539.pdfIn PDF document text
    • https://site-1172607.mozfiles.com/files/1172607/maxisys_ms908s_pro_user_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/lqiexih/naboxululadekus.pdfIn PDF document text
    • http://vafakewa.iblogger.org/55528964351.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tafikepuvanotu.epizy.com/balupu_telugu_movie_songs_free.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_off0000d79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79F 5504 bytes
SHA-256: b0e543d984270812a3526523843007c8ebc809fa8d763a75c5bffa8ab1825905
font_01_sfnt_off0000ea85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA85 11092 bytes
SHA-256: 2079478f36dd66a130e911fe6e61c6af8cfe1defb6d0808c5c2413f6508f6072