Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5842ba4b18ff041…

MALICIOUS

PDF

72.2 KB Created: 2021-03-05 01:13:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1b8841808c93f2f8bbfa33d50775dfde SHA-1: db17150a686e85a32e8b9ffae0844e598113ff04 SHA-256: b5842ba4b18ff04110d13c95e210cb0b51027bc762098e55c77bce4c293bac80
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/wix?keyword=mary+ford+elementary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448724/normal_6024f1cda9f22.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/82093202.pdfIn PDF document text
    • http://tesepaxe.iblogger.org/georgia_drivers_permit_application_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475872/normal_5ffb8aba96c06.pdfIn PDF document text
    • http://nakekizedexu.getenjoyment.net/reasons_to_end_the_federal_reserve.pdfIn PDF document text
    • http://nunesop.scienceontheweb.net/what_does_wearing_an_ankle_bracelet_mean.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495385/normal_5fc88c51378c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487399/normal_5ffabc0bb95a1.pdfIn PDF document text
    • http://digovin.getenjoyment.net/how_to_solve_limits_numerically.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://noroved.myartsonline.com/lumuxovajo.pdfIn PDF document text
    • http://wisakixatepifu.epizy.com/pifovibomizaza.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/genonito.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/15907856967.pdfIn PDF document text
    • http://zinejamobasuwul.epizy.com/cuenta_conmigo_pelicula_completa_online.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/proving_triangles_congruent_using_sss_sas_aas_and_asa_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/appointment_letter_format_for_structural_engineer.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/electronics_symbols_and_meanings.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_off0000e00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00C 4980 bytes
SHA-256: 7a0d1b0c74b84dbcf7abd3141a30e3c41ec29113901a2b9d02211974785b6398
font_01_sfnt_off0000f0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FE 10204 bytes
SHA-256: f932d2847e77d16bf6d6287674bdfffc07df4dffab81688560b643e2e80593b6