Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffef256838630655…

MALICIOUS

PDF

68.7 KB Created: 2021-02-18 13:26:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6ef0b64c6ed8e255753e047b8eed7bda SHA-1: 079d24a2ee92feeff383f87ae17213b7e3e1d65a SHA-256: ffef25683863065584a4a037b673387484002177aa43db6d3ddaea290a166e25
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=what+is+qualitative+evaluation PDF link annotation
    • http://semengergel.ru/the_assassins_blade_the_throne_of_glass_novels_read_onlinep5m6l.pdfIn PDF document text
    • https://mamumudud.weebly.com/uploads/1/3/0/8/130814078/nikosuj.pdfIn PDF document text
    • http://liketime.fun/lesidokutefomogagazusobkxfy.pdfIn PDF document text
    • http://vknacruckalaikov123.xyz/remote_neural_monitoring_nsa1f09q.pdfIn PDF document text
    • http://vipmanmarket.space/harmonize_niteke_song_videojxfpp.pdfIn PDF document text
    • http://jabodaligononu.iblogger.org/gosapa.pdfIn PDF document text
    • http://fisuruwibowin.66ghz.com/carrom_board_game_free_for_computer.pdfIn PDF document text
    • http://supozupewurak.22web.org/statistical_test_of_significance.pdfIn PDF document text
    • https://fefizilev.weebly.com/uploads/1/3/1/4/131453506/nipusuboxepexaz_gelusunezazuf_jepaninapo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491414/normal_5ff2bd5066034.pdfIn PDF document text
    • http://nukicew.xyz/jurassic_world_evolution_battle_arena_all_dinosaursxty2s.pdfIn PDF document text
    • https://mozeduxazos.weebly.com/uploads/1/3/4/0/134018133/23503.pdfIn PDF document text
    • http://imm-shoes2.club/human_digestive_system_functionjz4r1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sijekovurodubo.rf.gd/o_processo_de_formao_do_aqufero_guarani.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/informasi_obat_ultraflu.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_off0000d0d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D4 4876 bytes
SHA-256: da88de1f64359f4d9185f11ec50bee59bf3649a4752dd60f4f966e660d1ddac2
font_01_sfnt_off0000e17e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17E 11000 bytes
SHA-256: ac4b4e5c08d58741d22fa9ab55a08e287d3ae552caa4bc6611da475f6c849a16