Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1ec2aa0f4d2346…

MALICIOUS

PDF

72.9 KB Created: 2021-02-28 09:47:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9851a991ca3a3c701bc69fd04597a5e2 SHA-1: 3d51216cd9368565cb0e145082e2e71363f9d776 SHA-256: bf1ec2aa0f4d2346112eacd0cb9d6271bf196e3936d94af5e27e3b40d5b162fa
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://druttle.ru/award?keyword=housing+allowance+for+clergy+worksheet PDF link annotation
    • https://cdn.sqhk.co/xuwadezab/xEhhXih/lovozenalexixupi.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/oqIyfii/guide_for_among_us_profile_picture_maker.pdfIn PDF document text
    • http://lidlid.xyz/colonies_pros_and_conspqe4r.pdfIn PDF document text
    • http://discount50.pro/sopa_de_letras_para_imprimirip1wp.pdfIn PDF document text
    • http://azakalaza3.xyz/how_to_program_verizon_remote_to_tv7to48.pdfIn PDF document text
    • https://kagesurofuzesik.weebly.com/uploads/1/3/5/3/135303772/7857552.pdfIn PDF document text
    • https://nitikado.weebly.com/uploads/1/3/4/6/134660078/e5b87a8c7ea.pdfIn PDF document text
    • https://cdn.sqhk.co/kamupudoro/ig7geYf/kimipun.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/o7CXDjg/default_link_color_css_html.pdfIn PDF document text
    • https://xakediripikevul.weebly.com/uploads/1/3/4/3/134338645/4743054.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/hhgkemd/dental_assistant_school_paterson_nj.pdfIn PDF document text
    • http://mrshadow.net/cours_liste_chaine_en_cusbfx.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/Gjjq8Of/roref.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/deadpool_game_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/tisud.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_off0000e249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE249 5360 bytes
SHA-256: 831cf1df22b72e0f36522bc3d94a20de1e176894c73e37cd15975d7db241814f
font_01_sfnt_off0000f497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF497 9880 bytes
SHA-256: 18c78c1493339c7718823ecebce8f0dfe101b8345cabd3c74c7673cd9ac5f6f0