Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f79ff4c3dbca3e8…

MALICIOUS

PDF

63.0 KB Created: 2021-02-06 20:28:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 041aaea83814b05fdbd27e2e7ca28c0e SHA-1: 7678e2a9006d4be85685bb1302244e4fbd9b001e SHA-256: 1f79ff4c3dbca3e8decb5456c7272b8abb57790f39a8064d820693b4e548cc78
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/aws?utm_term=vernier+callipers+zero+error+worksheet+pdf PDF link annotation
    • http://hurleyshamburgers.com/povezexosegigimegilixuump16.pdfIn PDF document text
    • https://cdn.sqhk.co/muresogus/G4gdgcY/91465154102.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/fhdyqUp/28412837445.pdfIn PDF document text
    • http://lnstagramsupportingcenter.com/xiaomi_mi_a2___android_10cyjw4.pdfIn PDF document text
    • https://cdn.sqhk.co/mokabawimav/gibJXra/cops_and_robbers_mine_mini_game.pdfIn PDF document text
    • http://begetus11ppz.xyz/6564977411daact.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494139/normal_60132d6a4f10a.pdfIn PDF document text
    • http://latuha.com/random_four_digit_number_generatorhed60.pdfIn PDF document text
    • http://rimka.xyz/what_is_critical_solution_temperature_of_phenol_water_system0cxuq.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/learn_japanese_book_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/hZhaXhd/91817600282.pdfIn PDF document text
    • http://naturwows.space/zaxirosalarepeflbfk6.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/zebarufuridorur/apex_legends_autoexec_for_performance.pdfIn PDF document text
    • http://sidiwen.epizy.com/dulexoxevej.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/kavelofiziz.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_off0000b58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB58C 5416 bytes
SHA-256: 5ac561405da1daf0e6da5e5219b07816a88c9da009d1fd2b0e85cc83e47eddbd
font_01_sfnt_off0000c80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80D 11176 bytes
SHA-256: 627bcc923fab2d286e0b1de2747725fb6831ba9da7bdd4518e5e25d0b93ae377