Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a46f405d18b992…

MALICIOUS

PDF

82.2 KB Created: 2021-03-22 15:29:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f96ab97fdef13fd27f276f201536037a SHA-1: 5d8c5b421f42aed3fe46187562a2183cc2ab9d57 SHA-256: 89a46f405d18b992e9680225e4d2578c315dcf0fc83b74b0cbcf6f6ded44a2ec
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as a link farm, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating the document is designed to host links to other malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/award?keyword=asme+journals+free+download+pdf PDF link annotation
    • https://cdn.sqhk.co/zogowefu/EgegdAr/26694705815.pdfIn PDF document text
    • https://cdn.sqhk.co/duporetixi/e5gdjbw/37623955668.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/30668743068.pdfIn PDF document text
    • http://gazupoz.sportsontheweb.net/download_adobe_reader_for_apple.pdfIn PDF document text
    • http://degakak.sportsontheweb.net/allons_y_2_letlts.pdfIn PDF document text
    • https://cdn.sqhk.co/rufetuzek/iJE9Ygg/free_piano_sheet_music_for_beginners_disney.pdfIn PDF document text
    • http://woziwowariv.sportsontheweb.net/cambridge_cae_exam_practice.pdfIn PDF document text
    • https://cdn.sqhk.co/nubavojek/jvOlrhb/amc_schedule_christmas.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/d3Wibid/13009436160.pdfIn PDF document text
    • http://kurekarer.22web.org/zenuvuf.pdfIn PDF document text
    • http://rovanenafet.getenjoyment.net/1343930933.pdfIn PDF document text
    • http://lowufadit.scienceontheweb.net/motadozonamozi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://movuzawizigevej.myartsonline.com/how_to_remove_bookmarks_from_old_computer.pdfIn PDF document text
    • http://tagijonegularol.myartsonline.com/89079674.pdfIn PDF document text
    • http://pufawalaxovosi.epizy.com/aluminium_6061_t651_properties.pdfIn PDF document text
    • http://lojubefogugiku.onlinewebshop.net/how_much_is_needed_to_start_forex_trading_in_south_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d599899d-b029-4d0d-b425-d0ade4b624ac/how_to_change_vacuum_belt_hoover_windtunnel_t_series.pdfIn PDF document text
    • http://xegivitusok.epizy.com/microsoft_word_brochures_templates.pdfIn PDF document text
    • http://perurafofasiw.epizy.com/welunixivuzezukom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca78e0bc-3634-4d34-bf8f-54b9c1a9cd16/how_hot_is_the_burger_king_spicy_chicken_sandwich.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94e14c50-f30c-4ec0-b62e-9a75d25fc754/88210010904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bbfea21-2d48-4231-be72-564cad7d739f/what_is_the_difference_between_dyson_v7_motorhead_and_animal.pdfIn PDF document text
    • http://kidagemomosate.epizy.com/botanicula_for_android_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8ef6916-a5da-4c24-adfd-0790dccbf01c/nosir.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EA 5096 bytes
SHA-256: 12990c6ec97155f2588a45254f6b7ed7e6ac9e5fe1c5e790f44977431e134676
font_01_sfnt_off00010536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10536 11920 bytes
SHA-256: eda97ab0d540f0d910443acd104b1e8c1a66786c9d27cc608c3ee51f7f0774c9
font_02_sfnt_off00012d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D2B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2