Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec2cd13457288a6…

MALICIOUS

PDF

72.8 KB Created: 2021-02-19 23:54:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6f2921645e619aee82a53ed56bd50222 SHA-1: b671c4b72a0d4f549d9c932b8795f23bb821e2a2 SHA-256: 4ec2cd13457288a6763723b49c834ec0ec58dbcb4cf6e3728188cd68107ac06e
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/wix?keyword=rhombus+angles+worksheet+answers PDF link annotation
    • http://lezapogogaz.iblogger.org/realidades_1_capitulo_1b_answers_guided_practice.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/Sw6njfM/56692976850.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483388/normal_5ff0c17550ed7.pdfIn PDF document text
    • http://nuxagoliwanep.22web.org/chrome_new_update_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/XxvtjcD/game_hack_speed_hack_tool.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376105/normal_5fcca79f1f590.pdfIn PDF document text
    • https://cdn.sqhk.co/fakodozug/jehjdhh/small_cruise_ships_for_sale_australia.pdfIn PDF document text
    • https://datedevob.weebly.com/uploads/1/3/1/3/131381982/c6e08d08.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/Ygjifjh/lighthouse_drawing_pictures.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/dOgegi0/business_bluffing_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/jhMjjgj/48679199632.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385859/normal_5fdd71038de2b.pdfIn PDF document text
    • https://gikunagab.weebly.com/uploads/1/3/0/7/130738902/6660459.pdfIn PDF document text
    • https://cdn.sqhk.co/davusegeb/Ihamjbg/35701227778.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415524/normal_60052a032db0f.pdfIn PDF document text
    • http://fumaposowev.22web.org/best_4k_video_er_for_windows_7.pdfIn PDF document text
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/8265775.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gagisejokunego.rf.gd/6343252865.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/wedaketedifevulowexefezus.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/91689536788.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/affidavit_template_south_africa_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/film_chouseishin_gransazer_sub_indo.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_off0000df3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3E 5404 bytes
SHA-256: c229d9a7b8c4b23350daa708dc7a460f9331e9f671d360af161cad3568101d13
font_01_sfnt_off0000f185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF185 10652 bytes
SHA-256: 4bc7a72349a4d4c5e27787ee779ce02117b23a26394c29a941b6ce19e86a83b4

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