Malicious PDF — malware analysis report

Static analysis result for SHA-256 d66a01abb4812bf3…

MALICIOUS

PDF

66.8 KB Created: 2021-02-27 23:02:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: cde18ea5eb7ddabd1d015853e3bef197 SHA-1: c3ba3912a60a6a75bd6a77b79e2388affdeef143 SHA-256: d66a01abb4812bf3acaf20d0d339972b67326aad0dd1e35de9e8e4fa0ebcc6fb
184 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=where+does+the+term+arthritis+come+from In PDF document text
    • http://worabipupe.mypressonline.com/dumobekegudide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501045/normal_60137882c384c.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/60361170659.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/gfjjvic/ordinal_data_level.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/chdMjeH/62020086260.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475715/normal_5fe6ce832d779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449602/normal_5fd2745d15a6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475987/normal_6037bc946c8fc.pdfIn PDF document text
    • http://kind-insta.site/bonixavawasukito6suin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467577/normal_6006905aba809.pdfIn PDF document text
    • http://dududuw.mypressonline.com/bakuweminekiwivoxovesozok.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/how_to_delete_facebook_account_2020_ios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391611/normal_602d8c586be31.pdfIn PDF document text
    • http://liko-sneakers.com/kielbasa_recipes_sheet_pan2ra69.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/93153237131.pdfIn PDF document text
    • https://cdn.sqhk.co/nosimasiv/UBYrjif/40771410083.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
    • https://s3.amazonaws.com/tixeligufokup/best_bike_route_app_android.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_off0000bdf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF7 4924 bytes
SHA-256: f93f3aa8ffd4071fe319ee62bfe1a9e32ec18ffac2ee9bf4c0d168a622e4138f
font_01_sfnt_off0000cebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBE 9688 bytes
SHA-256: 736c60f2008881bc886f50ed6090593f9b07ea7a15e833361dd4792280600a88
font_02_sfnt_off0000efd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD2 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333