Malicious PDF — malware analysis report

Static analysis result for SHA-256 4157c033905710e5…

MALICIOUS

PDF

73.2 KB Created: 2021-02-26 03:56:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 546202f494de34cd297adafab54a398b SHA-1: 781e9ffc5e8ecb098298e1cd320ca363b2f720e8 SHA-256: 4157c033905710e5ea172e09fc628312f449b7b9fb3b2916f5500b799e8a1dd2
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=interior+and+exterior+angles+worksheet+tes PDF link annotation
    • http://xevusezes.medianewsonline.com/derechos_humanos_consagrados_en_la_constitucion_de_la_republica_bolivariana_de_venezuela.pdfIn PDF document text
    • http://luxshop21.site/19748723124iw7le.pdfIn PDF document text
    • http://tuimag.ru/siwibijijezajiwiterafiwif1al9v.pdfIn PDF document text
    • http://brosbass.com/tower_crush_hack_versiono6o77.pdfIn PDF document text
    • https://cdn.sqhk.co/moxulofilose/gdibDV4/ion_party_boom_speaker_review.pdfIn PDF document text
    • https://cdn.sqhk.co/zewumabigige/hbhaFia/c_compiler_identification_is_unknown_ubuntu.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/feja2jc/xugavafenelekijev.pdfIn PDF document text
    • https://cdn.sqhk.co/vudemijugamu/enHvgez/mcpe_modern_house_map_download_apk.pdfIn PDF document text
    • http://obsluzhivanie-kompyuterov.moscow/pdf._js_canvas_vs_svgaek2a.pdfIn PDF document text
    • https://cdn.sqhk.co/wanadujogo/biehbid/gaxetomofalonarozitanawob.pdfIn PDF document text
    • http://niburufajanuto.sportsontheweb.net/60305780595.pdfIn PDF document text
    • https://devudupaf.weebly.com/uploads/1/3/4/8/134880603/taxozizagigamux.pdfIn PDF document text
    • http://leledup.mypressonline.com/weight_loss_chart_printable.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/hdZhdP4/49776086091.pdfIn PDF document text
    • https://cdn.sqhk.co/vekunego/iighihb/waze_no_apple_watch.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/ovid_metamorphoses_summary_book_4.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/kavuganufx7vph.pdfIn PDF document text
    • http://nazorizuz.medianewsonline.com/bekezidegeserutefitono.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kedisijusa.onlinewebshop.net/pasesurevoxa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52F 5036 bytes
SHA-256: 1ddcd5eb86d42d50ae35334732e5755028061d61a63047d1160b85828751a254
font_01_sfnt_off0000e654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE654 10220 bytes
SHA-256: 50ab8927d98aadd796ed445854ba65ae9a2afbc2814cc36d42c8667b78491e86
font_02_sfnt_off00010964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10964 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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