Malicious PDF — malware analysis report

Static analysis result for SHA-256 c40a6d83ffe97cbd…

MALICIOUS

PDF

71.4 KB Created: 2021-02-10 16:55:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ccea5f94cd73d72169cedcaaad718de5 SHA-1: b0574567d07ad30d417a8bad59daead26753dbb0 SHA-256: c40a6d83ffe97cbd78c1c031ed1a127176085f9f315303173675853825ee27cf
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wb?keyword=marriage%20certificate%20%20online%20gujarat PDF link annotation
    • https://jotukodapoze.weebly.com/uploads/1/3/4/6/134632246/1874112.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwexosul/Thfghge/cotton_classing_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/ibvUu4Q/noxobixoravakabewikazenon.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/ihL0Phf/vukumofemekeruwukibogepej.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/bcfTf9N/lemon_blueberry_bundt_cake_recipe_using_cake_mix.pdfIn PDF document text
    • https://bofetolukolun.weebly.com/uploads/1/3/4/0/134018575/kimematajax.pdfIn PDF document text
    • https://cdn.sqhk.co/riwutosax/ceJdjjh/best_business_games_ios_free.pdfIn PDF document text
    • http://seamanygau.best/6.5_creedmoor_load_data_imr_4350766m0.pdfIn PDF document text
    • http://telgrm.site/hop_valley_springfield_phone_number9inhm.pdfIn PDF document text
    • https://cdn.sqhk.co/lijedubejop/Azifjcb/documents_scanner_scan_documents_to_mod_apk.pdfIn PDF document text
    • http://voxazeveli.22web.org/25849341930.pdfIn PDF document text
    • http://jakor.pro/97671782136gh08a.pdfIn PDF document text
    • http://artemk.ru/37065389132x5rcq.pdfIn PDF document text
    • http://jukekelexoseda.22web.org/bachiko_nannali_hd_video_song.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwezomu/nCdahii/emerald_green_bubble_mailers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBF 4952 bytes
SHA-256: e8eb7607d51dfd1f7efe78eed46fd60d0626742676b439151aa9d240bcba88c9
font_01_sfnt_off0000ecbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBF 10684 bytes
SHA-256: 63e9ffe9d15df50ee896fd4665b8240d14686188ac8810c06cd43f5d8a25f741