Malicious PDF — malware analysis report

Static analysis result for SHA-256 23f3783dc78e5394…

MALICIOUS

PDF

74.7 KB Created: 2021-02-04 04:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d7065a3b3ebdf7731b9a425b464b3135 SHA-1: 89150b85072e1e58606abc4fac1be3f307c9b9bf SHA-256: 23f3783dc78e539493eec4b52c04846ad71c256414e3d306c6ad95bf3b32fbc0
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/aws?utm_term=affordable+care+act+law+pdf In PDF document text
    • http://luchdobro.site/nail_salon_with_hello_kitty_chairs_near_memc3w8.pdfIn PDF document text
    • https://cdn.sqhk.co/nulegudup/YehbjeU/monster_farm_game_mod_apk.pdfIn PDF document text
    • https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/rodivizek.pdfIn PDF document text
    • http://lodixewovufosa.iblogger.org/50696119789.pdfIn PDF document text
    • https://cdn.sqhk.co/karelevo/cihvjg4/divaricate_latin_definition.pdfIn PDF document text
    • https://lapaluletegole.weebly.com/uploads/1/3/4/6/134679291/544406.pdfIn PDF document text
    • https://vamotavobepud.weebly.com/uploads/1/3/1/4/131438348/bekudipetunome-tudur-posoxujir-dowuzokudatunit.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/gjjh0yE/62958153103.pdfIn PDF document text
    • https://wokopapun.weebly.com/uploads/1/3/5/3/135388848/3ef90b839.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://remigesej.epizy.com/internet_speed_ookla_apk.pdfIn PDF document text
    • http://nalirabagetovop.epizy.com/biography_template_for_middle_school_students.pdfIn PDF document text
    • http://kovejenipo.epizy.com/belaseshe_full_movie_720p.pdfIn PDF document text
    • http://zepinurubav.epizy.com/kaun_banega_crorepati_questions_with_answers_2019.pdfIn PDF document text
    • http://dosatetirudipu.epizy.com/mobile_background_hd_wallpaper.pdfIn PDF document text
    • http://govogudumig.epizy.com/critical_race_theory_third_edition.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_off0000e6bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BB 5192 bytes
SHA-256: 116b15e137dc5d4c11b41b3ac97793c34372b056325c8607863bf0f8420d2749
font_01_sfnt_off0000f882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF882 11168 bytes
SHA-256: 529dab5b5e9a02ed1ae5d7db6a83e13e48f5e615be0ae247379d4c014e413ab0