Malicious PDF — malware analysis report

Static analysis result for SHA-256 c25f4bb499d2b6d4…

MALICIOUS

PDF

71.8 KB Created: 2021-03-05 08:05:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 2669d180f2faaacc9b609134bc15b8a8 SHA-1: 0ba837a24dbe9b49f1a608753dc920dea18355bd SHA-256: c25f4bb499d2b6d43770039e4f13202e7330d2ef0a614e6607a5b9317dfe2d28
186 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
  • 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.
  • 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://pelibifir.ru/wix?keyword=french+and+indian+war+word+search+pdf+answers PDF link annotation
    • https://cdn.sqhk.co/jolodovi/jcheEib/big_wings_restaurant.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/1gjDlN6/dream_piano_music_game_download.pdfIn PDF document text
    • http://smallita.space/bike_map_gps_download85cv7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417664/normal_5feb6b61b83a5.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/dhbTO5E/fonts_for_instagram_and_facebook.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485310/normal_60081549dd1c6.pdfIn PDF document text
    • http://spacexfoundation.net/88971769614bm3zt.pdfIn PDF document text
    • http://matras-24.ru/parallel_lines_cut_by_a_transversal_worksheet_coloring_activity_answers9np2s.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/aqhjjcH/beto_alfa_noticias_empresario.pdfIn PDF document text
    • http://techanomic.com/15623833322bm6kj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444638/normal_6041ace5ba949.pdfIn PDF document text
    • https://cdn.sqhk.co/lafixafif/jiieihh/68478199047.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/77ZFkih/cisco_webex_meetings_virtual_background.pdfIn PDF document text
    • http://liolika-rsya.ru/tuzowepisj63wa.pdfIn PDF document text
    • https://cdn.sqhk.co/kabevapixox/jihf9hf/fesowikigikaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/jasamomedam/hjwfajh/drum_machines_studio_equipment.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b54663a3-ff9d-4122-b75c-69b71428c9b0.filesusr.com/ugd/cfa91a_ca6457d77f9348c8af615b696b43dab4.pdf?index=trueIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_93f833ccdd804e91a81ef99ba881f210.pdf?index=trueIn 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_off0000ddcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCB 5256 bytes
SHA-256: 52027110ad37a90cb82d19b8b6cd272f2fca8015aa7f236f092277a3d0c42bdd
font_01_sfnt_off0000efbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBD 10096 bytes
SHA-256: ceee96f0d71aef7b6dfdd919ad366663752358a62fe879aa007b7cb619834830

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