Malicious PDF — malware analysis report

Static analysis result for SHA-256 c78fca120cb2f939…

MALICIOUS

PDF

69.3 KB Created: 2021-02-10 19:45:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 237b84a554a8e9144145cdeecf43e6d9 SHA-1: 24bfedd224796aa521e42048b8574b22a322498e SHA-256: c78fca120cb2f939897825fa9ccc6d26471419266001a52f020c35ae9c5c60c6
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=balance+sheet+debits+and+credits+simply+explained In PDF document text
    • http://bluetea.space/32878491485esbf.pdfIn PDF document text
    • https://wedodoto.weebly.com/uploads/1/3/5/9/135993452/9249941.pdfIn PDF document text
    • https://cdn.sqhk.co/libigekukaru/b5hbjbH/endless_arena_idle_strategy_battle_game.pdfIn PDF document text
    • http://ejinaya.com/live_match_scores_and_schedule_for_liverpoolfft13.pdfIn PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/jipufuvosiduwexi.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/jtdRarJ/lupokizidezafejibowebusa.pdfIn PDF document text
    • http://hangookoil.ru/robert_greene_batan_karma_sanat0gaje.pdfIn PDF document text
    • https://cdn.sqhk.co/vizoxaxijojo/oQeiiii/dale_vida_a_tu_cerebro_epub_gratis.pdfIn PDF document text
    • http://christinaanddavid2019.com/lagu_dsas_dunia_sementara_akhirat_selamanyayy6k1.pdfIn PDF document text
    • https://ralerafuzirepob.weebly.com/uploads/1/3/4/3/134386916/perurupenafufafejes.pdfIn PDF document text
    • https://vadopesi.weebly.com/uploads/1/3/0/7/130738994/5188421.pdfIn PDF document text
    • http://hhizmet.com/forgotten_bullet_shrinezdowm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuxekijonudi.epizy.com/godox_tt350_guide_number.pdfIn PDF document text
    • http://zexelebisitod.epizy.com/mufubusojanige.pdfIn PDF document text
    • http://buxazub.epizy.com/duwukusebefuvek.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_off0000d378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD378 5672 bytes
SHA-256: a275302509684fb4c4d7cecb738eb74a5c9e67f810c56bfbffef715343be26c8
font_01_sfnt_off0000e697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE697 10164 bytes
SHA-256: 34b7b9c4c2f50823e5392e382f7c2ccdd07ec32222834c2d8717cc5d7faa51df