Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a8475cc0b307bb…

MALICIOUS

PDF

77.1 KB Created: 2021-02-19 09:39:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bcd71c0abaf1a6071fbc55b80df576a2 SHA-1: 2e83cbaadab1cf11a735e8fc5660e5d53dc87465 SHA-256: 51a8475cc0b307bb11099ba264710cd80efe8cc6257ca48b58c6346cc26af126
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/wb?keyword=how%20to%20use%20rode%20stereo%20videomic%20pro PDF link annotation
    • https://cdn.sqhk.co/futidiwe/fjhthfj/83689159177.pdfIn PDF document text
    • http://bottlechainworld.com/votibowiselutovopauz9ba.pdfIn PDF document text
    • http://zhigina.ru/94272336815g45t4.pdfIn PDF document text
    • http://kmplitka.shop/how_to_tell_if_you_need_transmission_fluid_changeens2a.pdfIn PDF document text
    • https://verigidiloje.weebly.com/uploads/1/3/0/8/130874422/fipopam-fijaguzikozez-gewoxe-laxofope.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/aBWhdge/download_idle_makeover_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/ijghiQf/mexican_word_of_the_day_today.pdfIn PDF document text
    • http://klosheff.xyz/halo_custom_edition_product_key_geneoo2fm.pdfIn PDF document text
    • https://cdn.sqhk.co/xadowififux/gfhefhj/9738596247.pdfIn PDF document text
    • http://alexandreablog.com/b_arch_paper_formatpgn0d.pdfIn PDF document text
    • http://zathkatow.xyz/bhagavad_gita_swami_prabhavanandaycc9h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jijari/nexivedatawovikofa.pdfIn PDF document text
    • http://vogojitipam.epizy.com/burma_tv_9._6.pdfIn PDF document text
    • http://fabupumow.epizy.com/general_information_about_the_vietnam_war.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/doing_business_index_2019_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/19202657489.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/formation_of_aberrant_synapses.pdfIn PDF document text
    • http://xagejerebim.rf.gd/formato_de_arrendamiento_de_casa_habitacion_gratis.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_off0000ee41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE41 5092 bytes
SHA-256: 8be1d0af2cad7ec0321a3b4d7268adc6dbb52eadef3fa9559953d0d90c23912f
font_01_sfnt_off0000ff98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF98 11724 bytes
SHA-256: 21c6c2ef7a20e64746d9de0a556a430097cd2aefbb271c0e14c33a339ecb4820