Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4508bbfd30bfac9…

MALICIOUS

PDF

71.3 KB Created: 2021-02-27 20:40:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6c0d799c77d671fb67d17d90587b0cce SHA-1: 83d0299ff13bfe532e47b82a41b94b4774b60202 SHA-256: e4508bbfd30bfac9304121ce569a7e47e7a0e657a7e03c6e8eb95f42a5094707
196 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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://botokaw.ru/award?keyword=how+to+file+a+tax+return+on+ssi PDF link annotation
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/2646899.pdfIn PDF document text
    • https://pelefazefipaguj.weebly.com/uploads/1/3/4/8/134892892/b2c397047.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/5cyicgO/34126783896.pdfIn PDF document text
    • http://nazorizuz.medianewsonline.com/kenmore_front_load_washer_f28_error.pdfIn PDF document text
    • https://cdn.sqhk.co/vamunidibu/eehfhjK/retro_racing_game_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/hSgjEWC/short_stories_in_english_free.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabakope/idRzgj2/5479143331.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/subway_surfers_para_hilesi_oyun_indir_club.pdfIn PDF document text
    • https://cdn.sqhk.co/guxifunuris/sibvzha/97147837556.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/acca_sbr_march_2021_exam_dates.pdfIn PDF document text
    • https://cdn.sqhk.co/kisudosus/jgHtvhc/most_popular_car_driving_games.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mefugoniwiw.epizy.com/41365424133.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_off0000db70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB70 4880 bytes
SHA-256: b7a73234279de93a5153f031c4aeaf897fa418607f6077c1715847309224ad36
font_01_sfnt_off0000ec2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2C 10660 bytes
SHA-256: 5aa84aa4c8b5ab03892d1d29be59a283de34e335986bc622af3afa90878cd996