Malicious PDF — malware analysis report

Static analysis result for SHA-256 a99bb2e2c8883997…

MALICIOUS

PDF

76.7 KB Created: 2021-01-26 03:13:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 65f90c1673100ae6bae198b3eecf57c9 SHA-1: 0c12774693f1f2246da0a108c770c822f1ff907b SHA-256: a99bb2e2c8883997ed722a5cf3acfc30c74c2f21104343a65a19f2171cc49a59
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://cctraff.ru/shook?utm_term=the+room+movie+2003 In PDF document text
    • http://yeswins.space/karawizeruwevo4rx7d.pdfIn PDF document text
    • https://cdn.sqhk.co/tamikoveken/hciialx/xiwuduwaruwag.pdfIn PDF document text
    • http://tophomework.space/levemolnwubu.pdfIn PDF document text
    • http://lovechat24.club/descargar_city_car_driving_2020_mediaf_rertgb8.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/7jihijc/donkey_kong_arcade_artwork.pdfIn PDF document text
    • http://salea.site/electrical_wiring_diagram_symbols_ukj9rrt.pdfIn PDF document text
    • https://davijonixumitu.weebly.com/uploads/1/3/5/3/135349017/6230073.pdfIn PDF document text
    • http://zinekob.66ghz.com/madam_baith_bolero_song.pdfIn PDF document text
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/5755924.pdfIn PDF document text
    • https://cdn.sqhk.co/jasojime/lpihYif/dead_wallpaper_photo.pdfIn PDF document text
    • https://cdn.sqhk.co/pesenexur/bFcghnl/best_nearby_chat_app_in_pakistan.pdfIn PDF document text
    • https://gozulisob.weebly.com/uploads/1/3/4/0/134012313/labejitudidafotewut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://limazajot.rf.gd/41746810056.pdfIn PDF document text
    • http://vopapatadape.epizy.com/xojad.pdfIn PDF document text
    • http://nisogifamesada.epizy.com/ardaas_movie_hd_filmywap.pdfIn PDF document text
    • http://xifetofaramil.rf.gd/dental_caries_2013.pdfIn PDF document text
    • http://mobopufo.rf.gd/degupejofuxexofa.pdfIn PDF document text
    • http://rapuxatidugek.epizy.com/38844782402.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_off0000f21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21D 4952 bytes
SHA-256: 349ec3759693db4350b66034acf8182b6b9764412eb68661c25c77f9215b75ab
font_01_sfnt_off000102d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D8 10320 bytes
SHA-256: 500406073b31c0ee04752cf61ee0180b8e07c12518f026bd58e0e930495e8b28