Malicious PDF — malware analysis report

Static analysis result for SHA-256 4371b423c37248ef…

MALICIOUS

PDF

61.1 KB Created: 2021-02-24 05:05:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bc54bed1cbfb721ad7da6ce442480d56 SHA-1: 0c0556a1ca540f8c2e452e7de42d043667b25d6c SHA-256: 4371b423c37248ef40e575f4f30654ff97180fe0c0bd51039708984d27ac45c1
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wb?keyword=mary%20poppins%20musical%20songs%20lyrics PDF link annotation
    • http://mihetos.xyz/mixed_present_tenses_exercises_intermediatezsj3g.pdfIn PDF document text
    • http://trenketo.buzz/css_link_hover_color_not_working3nly0.pdfIn PDF document text
    • http://pumba-timon.space/lozudidupasosoz7kxkm.pdfIn PDF document text
    • http://krokoboko6.xyz/568763975127b7c7.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/fotuferobopomowobawojikij0h92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492278/normal_6003182d76992.pdfIn PDF document text
    • http://pycnidwzxc.info/writing_samples_for_middle_school_students22e7u.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/buddha_amritwani_marathi_video_songyjib9.pdfIn PDF document text
    • http://prodive.su/go_fish_card_gametsnfk.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/ark_phoenix_ash_pile17iv7.pdfIn PDF document text
    • http://ens-pictures.ru/sunijorobagubolovagowobzoh75.pdfIn PDF document text
    • http://pollsexpert.com/miruzapesonuu1o9i.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/vixuwogetiv/businessman_2_film_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/kofidozupogifojegemezejim.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/rudinewoxilux.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_off0000b30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB30E 5360 bytes
SHA-256: e9ed3b94f289b5902a4c05e750a0c1eb90a8fc86f0ebfb2fae0502de3d48c8a0
font_01_sfnt_off0000c548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC548 10000 bytes
SHA-256: 26739788c9c306d6c82ed8b27ddeac5b3fbc2bd1299933376b364cf597c9791d