Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f80fbda7b234da9…

MALICIOUS

PDF

72.8 KB Created: 2021-02-28 07:53:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 71959a938b13e2737f3109614e4d19b5 SHA-1: cf9129963f9702e728bfd5e597cd43ca2009b1b0 SHA-256: 4f80fbda7b234da96873a49743610ca138affe422c79484ccaa3840641ff7bb0
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://xajibur.ru/award?keyword=short+research+paper+format PDF link annotation
    • https://cdn.sqhk.co/lijuwezasip/FyzhjKC/88706372082.pdfIn PDF document text
    • https://cdn.sqhk.co/zixifazod/ejeifjh/93056405753.pdfIn PDF document text
    • http://potoborotagivud.22web.org/tisugototalokuwoxitu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415045/normal_5fe1933b9a805.pdfIn PDF document text
    • http://kusulapezep.iblogger.org/31864911209.pdfIn PDF document text
    • http://afracheat2.xyz/tevuvesakobejokitapowibusmz12.pdfIn PDF document text
    • http://infokurs.design/duplicity_adjective_in_a_sentence_examplespf4ne.pdfIn PDF document text
    • https://cdn.sqhk.co/zewumirapeb/DwBNggN/who_could_join_the_knights_of_labor_union.pdfIn PDF document text
    • http://filemarker.store/regafaripola2fe6.pdfIn PDF document text
    • http://gododerur.66ghz.com/harry_potter_6_sinhala_subtitles.pdfIn PDF document text
    • https://cdn.sqhk.co/pifizumux/aTpBPRQ/ice_cream._places_nearby.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/lovetijif/lejatexegujobesazakazokuz.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/bio_poem_format_6th_grade.pdfIn PDF document text
    • http://lejaget.epizy.com/platformer_games_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/formato_historia_clinica_antecedentes_personales_no_patologicos.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/50231770556.pdfIn PDF document text
    • http://magetamuwunaze.rf.gd/suvonekesamezotulix.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/18786322280.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_off0000e19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19C 5328 bytes
SHA-256: 60b0e712a58e1023c50df8ca93bfa8a892da05a262a163d42a8f889912301adb
font_01_sfnt_off0000f390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF390 10016 bytes
SHA-256: 212987d233a8115e16fcf6d9f3d8c8e1272a69ff8ad2d23ff7e61cede62ede3d