Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9909617829fb1ef…

MALICIOUS

PDF

64.3 KB Created: 2021-01-22 23:24:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5de1ebeffaf9aa0a6cb184a5edb0ed65 SHA-1: 310e938ed791586537d4d9d9d21a71da0d294fe1 SHA-256: a9909617829fb1efb1bee7b87d881e106e8b2dc04485faae090af86b78f6db4f
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wb?keyword=my%20boost%20customer%20service%20phone%20number PDF link annotation
    • https://site-1175549.mozfiles.com/files/1175549/xivigetogi.pdfIn PDF document text
    • https://site-1256192.mozfiles.com/files/1256192/cell_phone_tracker_app_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/Mij1kic/msi_afterburner_overclock_cpu.pdfIn PDF document text
    • https://site-1176931.mozfiles.com/files/1176931/foluzizelova.pdfIn PDF document text
    • https://site-1183820.mozfiles.com/files/1183820/talking_tom_cat_game_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/rgeiiib/dixie_d_amelio_famous_song.pdfIn PDF document text
    • https://cdn.sqhk.co/ninasodivofi/f4ihjLj/trick_shot_shooting_games.pdfIn PDF document text
    • https://cdn.sqhk.co/dodirorip/jcgehgZ/hot_rod_movie_quotes_i_like_to_party.pdfIn PDF document text
    • https://nimivumunekal.weebly.com/uploads/1/3/3/9/133999229/nuzixojuk-zoguniguvi-tevarutatoj-nosovo.pdfIn PDF document text
    • https://cdn.sqhk.co/wabajevebe/hawvmgi/kleptocorns_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/menaleratupo/lS9ifDQ/2285404994.pdfIn PDF document text
    • https://site-1201024.mozfiles.com/files/1201024/item_analysis_report_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/mofipife/Ojhcgil/gun_strike_elite_killer_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/tikikizeveni/KNihp6l/god_of_war_card_game_cmon.pdfIn PDF document text
    • https://site-1166067.mozfiles.com/files/1166067/63091048762.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC011 5236 bytes
SHA-256: a9babf43b993d6fb15a7a9c674b063f3634292a32d5c0e3f0b8fd28131003921
font_01_sfnt_off0000d1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D2 10156 bytes
SHA-256: 75b595346859f006edd0988abf6aa8e9602661b68ef2535c8b1f5c077d933ebf