Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea2171881d02156…

MALICIOUS

PDF

76.3 KB Created: 2021-02-17 02:31:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 35d6e1c998a0dba963ace8e5fd72fc37 SHA-1: a48455f1778262ec6ff001734416f3bb8a6c1c51 SHA-256: aea2171881d0215663004109f7896b920e2e6905bba3ae1ce05961c63ab369e6
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/wb?keyword=pride%20and%20prejudice%20by%20jane%20austen%20summary In PDF document text
    • http://gelchlen.fun/biblical_dream_symbols_dictionaryz5apt.pdfIn PDF document text
    • http://pl50off.info/inference_worksheetsw95j0.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/gf96gjB/off_road_race_cars_for_sale_uk.pdfIn PDF document text
    • http://gbo.guru/barfu_am_klavier_noten2998a.pdfIn PDF document text
    • http://iuts.space/82356204990zxr88.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/favimidukidapabarac2hfc.pdfIn PDF document text
    • http://perevod-card2card24.site/roommate_or_roommate7rajl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427104/normal_60073f2fd889b.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/eSIWodh/womikugugidabuwo.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/CjgdKRf/furniture_design_center_panama.pdfIn PDF document text
    • https://cdn.sqhk.co/rubogomuweme/jjic59p/high_school_gangster_bully_fights_karate_girl_game.pdfIn PDF document text
    • https://cdn.sqhk.co/felodunom/C3Uiggg/tournament_organizer_software.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/colour_mixing_chart_for_acrylic_paint.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/machine_learning_cheat_sheet_github.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/29980426343.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_off0000eddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDF 5508 bytes
SHA-256: 043c533f8055b3a3e4b6348feccba42813de6b6fa3038d75e11377392de47a1d
font_01_sfnt_off00010086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10086 10440 bytes
SHA-256: eb05f93b076432c8f598da7cc143eed185c51aacbc2a624c626273350cb995fb