Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b3b5e487279884…

MALICIOUS

PDF

72.3 KB Created: 2021-02-24 15:52:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 72adffb5600f2e1bc8aaef2066b0d03d SHA-1: b43d29e10bfd9a643763a98122cb86704b27ffab SHA-256: c1b3b5e487279884c3b020828b884e7f5b855bd84f0b5bd235c21b4b66f64f78
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=is+lazyboy+worth+the+price In PDF document text
    • https://cdn.sqhk.co/wuxaguzifep/dJjhjhl/vukux.pdfIn PDF document text
    • https://cdn.sqhk.co/texafikogot/bhbjiia/soccer_football_tournaments_2020_near_me.pdfIn PDF document text
    • http://foyou.store/zilojuvedapuzovi68xcp.pdfIn PDF document text
    • http://podarokinsta.site/bmobile_prepaid_plans0wi7s.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/wimapodumixesikapizokinek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471106/normal_6032952986ad4.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/gjgBif0/use_smart_switch_to_transfer_files.pdfIn PDF document text
    • http://megantv.site/tigubitukivunesivokubanehmbxt.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/xhj2VK9/pizza_snacks_in_air_fryer.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/jdhf2QR/gerenemi.pdfIn PDF document text
    • http://dfds.in/maven_installation_eclipseoqwdl.pdfIn PDF document text
    • http://vvinorama.fun/fesaxizinekexomidumekim7stt.pdfIn PDF document text
    • http://lngcliente.com/discord_verified_games8fu7p.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/modo_de_produccin_de_la_comunidad_primitiva.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/ha6Ciew/skilltwins_soccer_game_2_football_skills.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_off0000de3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3E 5340 bytes
SHA-256: 908c5eb96373a972d7429eda1fecee1b035267c6a93e2e58fb4532dd8d327032
font_01_sfnt_off0000f080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF080 10700 bytes
SHA-256: 1d13bccddfcf2cc6ef2d2dbc47491aa17a208d1901fcc6b1544a73b6c63edc44