Malicious PDF — malware analysis report

Static analysis result for SHA-256 af6a375570487614…

MALICIOUS

PDF

70.9 KB Created: 2021-02-26 14:19:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ed1f544b3870d21327f962923097a92a SHA-1: f60a8505e4ba75c72bcb772d277596f4739f7163 SHA-256: af6a375570487614b26f9cb6662ba723401c4dd94bdefde52e0149ab6e723adc
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://dafemum.ru/award?keyword=goodnight+moon+song+lyrics In PDF document text
    • http://tuwukadinem.mygamesonline.org/tekugusexiregokowad.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/what_is_the_best_griddle_for_a_glass_stove_top.pdfIn PDF document text
    • https://cdn.sqhk.co/mapexovebo/kjjjdQL/turbo_spinner_article_rewriter_free_download.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/hp_officejet_pro_8500_color_printing_problems.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452169/normal_5ff9ce838f575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453142/normal_601419af1c2a6.pdfIn PDF document text
    • https://cdn.sqhk.co/xodakebebit/ir0sNjg/redcoats_and_rebels_book_review.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/24673925055.pdfIn PDF document text
    • https://cdn.sqhk.co/zupololano/ggjbhd4/two_points_are_collinear_always_sometimes_never.pdfIn PDF document text
    • http://fruit-ital.space/gideon_s_trumpet_movie_answer_keyykhxf.pdfIn PDF document text
    • http://submonster.xyz/guitar_songs_tabs_and_chordshg9zw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juludiripo.myartsonline.com/vizio_vw26l_manual.pdfIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/samsung_55_inch_led_box_dimensions.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_off0000d93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93B 5276 bytes
SHA-256: 8a32f853cef2498dfda95c8c5ba9d72cb0f2ece8f654a318c86ca1a81aadfac9
font_01_sfnt_off0000eb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB13 10428 bytes
SHA-256: c3d08b16ca493b94e05cd2df7f7c62265def8d06acae9d09b8daa25a63e04cb0