Malicious PDF — malware analysis report

Static analysis result for SHA-256 279f6fa87d528ffb…

MALICIOUS

PDF

76.0 KB Created: 2021-02-12 23:53:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e9e00c424c305b6d6989702d52b378be SHA-1: a9b25c703b48be58f2deae8ce248fcbafbfcd528 SHA-256: 279f6fa87d528ffbaad89367dec6f319315d1093c7565c3c389951b4bef05c18
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jacksth.ru/aws?utm_term=princeton+review+gre+books+free PDF link annotation
    • http://legivupipofu.66ghz.com/samthing_soweto_akanamali_live_performance.pdfIn PDF document text
    • http://burutevopu.iblogger.org/arbeitszeitgesetz_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/jq1Onjg/dental_assistant_courses_cost_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/baresupujar/bjaEbtD/dejoxoduverawaxez.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/h7F1Iig/singing_machine_classic_series_reviews.pdfIn PDF document text
    • http://lienforkid.com/27430891550a3bcl.pdfIn PDF document text
    • http://rollernefrit.xyz/suduvip3wdc0.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/wjb37nX/31378281083.pdfIn PDF document text
    • https://sovivagigeb.weebly.com/uploads/1/3/5/2/135296454/viniwewesetifuxovulu.pdfIn PDF document text
    • http://zimejitudik.iblogger.org/7687506068.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/djb7jcE/demon_slayer_rpg_2_breathing_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/vadezewe/jhJgdzi/entergy_orange_texas_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/tajaketo/ge7Ohgf/sleeve_hitch_scraper_blade.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vowugapawixot.rf.gd/hematology_meeting_reports.pdfIn PDF document text
    • http://nanaxaj.rf.gd/akulaku_mod_apk_free.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_off0000ec2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2F 5164 bytes
SHA-256: 96d1fcaf138e23b730a182785e8b36939d6d041b2e3ce6ffd9703bff7d6b6859
font_01_sfnt_off0000fdf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF7 10984 bytes
SHA-256: 18459552ecd1e638bb655ed3806215de2897bbad152962b3412d2b0c5e119d5e