Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a3d74b0ba68afef…

MALICIOUS

PDF

73.0 KB Created: 2021-02-16 11:05:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 037aab59387f3b9d0181dc77a7bd5b86 SHA-1: bd0ed6a7170246329b18bc5463d04add7266c9e3 SHA-256: 8a3d74b0ba68afef6ca8016b8216103a51527c48b17555006d65440d7d9d6e9c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 http://vk-settings-change.online/4._Compara_y_contrastar_teoras_tempfkwda.pdf In PDF document text
    • https://gadakuvinud.weebly.com/uploads/1/3/1/8/131871823/952815.pdfIn PDF document text
    • http://usacreditmonitoring.info/giweluredepuxakokowakef9d5w.pdfIn PDF document text
    • http://reawont.online/high_school_geometry_construction_worksheetsvpgtz.pdfIn PDF document text
    • https://zoparidozuxeb.weebly.com/uploads/1/3/5/3/135390671/mazaluditek.pdfIn PDF document text
    • http://blog-millionaire.buzz/bodypump_97_music_tracklistiatfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445743/normal_600e4c765d7ec.pdfIn PDF document text
    • https://vetebifarex.weebly.com/uploads/1/3/4/0/134016991/4199808.pdfIn PDF document text
    • https://nobuzuza.weebly.com/uploads/1/3/4/7/134757083/vulavewa_fugibokatemoxil_zoreti_dokimirukepiw.pdfIn PDF document text
    • https://zotejukewas.weebly.com/uploads/1/3/5/3/135347558/762795c5e.pdfIn PDF document text
    • http://jirafka.space/antenna_light_font_freefgrf4.pdfIn PDF document text
    • https://jottigo.ru/wb?keyword=toshiba%20dvd%20recorder/vhs%20combo%20PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/motu_patlu_cartoon_video_2017_mp4.pdfIn PDF document text
    • http://buzabokinoka.epizy.com/bonfiglioli_worm_reduction_gearbox_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/19442037175.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/android_application_developer_jobs_in_pune.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_off0000df31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF31 5912 bytes
SHA-256: e279bd7512670a9302012329ee89387199fdd7d91af4205ec5b3d9efa1c3fc49
font_01_sfnt_off0000f340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF340 10416 bytes
SHA-256: 0254a82ef718f60e8fef7fb7b0f01d9ccf3b54df51ebe012716decbcf74bfa2d