Malicious PDF — malware analysis report

Static analysis result for SHA-256 37946250c401e9f6…

MALICIOUS

PDF

73.0 KB Created: 2021-02-06 08:00:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f58c0d8245895788b196c98ca716dc24 SHA-1: 17789c9c689b2dfab5c4d7d6e3879463d87056d9 SHA-256: 37946250c401e9f624cdab8a41d3793704291608e9b224db4088c403073ad41e
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/wb?keyword=no%20whatsapp%203%20apk%20free In PDF document text
    • https://static.s123-cdn-static.com/uploads/4451756/normal_5ffca5b2688ae.pdfIn PDF document text
    • http://rubyshup.space/jokuzowidatofikijidib4wfe.pdfIn PDF document text
    • http://idealica-italiaofficial.site/73887963577lc3s6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457302/normal_5fe9fcf8dd111.pdfIn PDF document text
    • http://copytoshka.ru/ck100_key_programmer_manualf20bw.pdfIn PDF document text
    • http://cheapestshop.xyz/ice_age_collision_course_in_hindi_dubbed_full_movie_mp4_downloadrd0sd.pdfIn PDF document text
    • http://nefritthebestthing.site/61017320276akggc.pdfIn PDF document text
    • http://insurancecarusa.com/market_basket_analysis_powerpoint_templater0630.pdfIn PDF document text
    • http://dalnoboyi.xyz/rofusotewitus3o2.pdfIn PDF document text
    • http://kuxogajow.iblogger.org/flowers_for_algernon_audiobook_progress_report_9.pdfIn PDF document text
    • http://shopyou.online/nupupoxapikegowitotatids0gsu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rubipupajet.rf.gd/ceo_definition.pdfIn PDF document text
    • http://laraxeramamat.rf.gd/tutorial_sql.pdfIn PDF document text
    • http://lavodusepigixu.rf.gd/klasifikasi_fasciola_hepatica.pdfIn PDF document text
    • http://lunijikujapike.epizy.com/perufawubunufobimo.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_off0000df49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF49 5244 bytes
SHA-256: 441db908c3dc455b81a1bba2619f6889a7b6a52e32492fe5c9677847e91e6721
font_01_sfnt_off0000f136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF136 11632 bytes
SHA-256: 296aa8e5f64b70579eed20217f2c1963cb2bb53a519bc27b57668696cf0ef6cc