Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fc1afff163c6128…

MALICIOUS

PDF

69.0 KB Created: 2021-01-27 13:49:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 84e42146d0970bf4482e6615fa88e3cc SHA-1: 4dfbb09417486641374b9bd3ea1234909da9f6dc SHA-256: 8fc1afff163c612844f9847c0b20e033aa3fa187903c2141dc0a722ed40a6eaa
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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.
  • 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=animales+invertebrados+ejemplos In PDF document text
    • https://cdn.sqhk.co/seponidozit/jheghjh/sales_receipt_book_officemax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471948/normal_5fe1ad70ed224.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/kogdgh1/59775866275.pdfIn PDF document text
    • http://busforpay.online/wegapelaxomisudulbflk.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.website/first_and_second_conditional_quizb1ic9.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/Eaha6Lj/good_naval_battle_movies.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/jlgtHid/obstacles_synonyms_in_spanish_list.pdfIn PDF document text
    • http://copyright-central-media.com/woodworking_plans_projects_magazinehvtyn.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/efyjfoB/fegezorapufokek.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxinugad/hghaujf/40327557027.pdfIn PDF document text
    • http://cherrypimp.online/worm._io_crazy_gamesqar2x.pdfIn PDF document text
    • http://wide-mean.top/destination_a2_free_downloadxo0pk.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/jhjbMje/past_future_mp3_song_download_pagalworld.pdfIn PDF document text
    • https://wanomumopanud.weebly.com/uploads/1/3/1/3/131379193/tugenunoduluja-fivakefew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nokonasaxe.epizy.com/itemized_receipt_template_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_off0000cc71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC71 5372 bytes
SHA-256: a542f0e0b53ff2442a63de3c8dce7f9a23b187b97b8b5e9891c5d9a67426124c
font_01_sfnt_off0000dea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA0 11976 bytes
SHA-256: eabd4ea307f820d7f65a4305d06de88d27e33b22f81adc03ee8dbb8b20a426ed

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