Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dd74a8dfd70f940…

MALICIOUS

PDF

66.6 KB Created: 2021-02-21 10:52:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a101b42b85fc85ccd360c6f8c9a71229 SHA-1: be2e17833ed71cae052d0c1f8f744f7f1e35403c SHA-256: 5dd74a8dfd70f940e0cece8da0e87a906400bc94a86af4e4d9872a531fbb765b
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=el+proceso+de+investigaci%25C3%25B3n+social+cualitativo+pdf In PDF document text
    • https://cdn.sqhk.co/tosobulig/vgeQba4/garewefufogo.pdfIn PDF document text
    • http://berkeciftci.net/fasirafawarigedezadergfb4.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.site/lean_product_playbookele86.pdfIn PDF document text
    • https://cdn.sqhk.co/lakekomum/eEiighf/pokemon_kanto_power_collection_box_canada.pdfIn PDF document text
    • http://republvinb.fun/hampton_bay_oil_rubbed_bronze_ceiling_fan_light_kitzqvzj.pdfIn PDF document text
    • http://rojelafireko.iblogger.org/29711660186.pdfIn PDF document text
    • http://fortuneo-enligne.com/hill_climb_racing_3_gamel6t5c.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/cyBgj73/tugamagemewejovivogutuzaf.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/gdVheii/47531664510.pdfIn PDF document text
    • http://womotov.22web.org/counter_strike_1._6_warzone_steam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nagivozuzosawax.rf.gd/80241736281.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/lexique_mathmatique_anglais_franais.pdfIn PDF document text
    • http://fanixagef.rf.gd/icivics_worksheet_answers_philosophically_correct.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/18101508337.pdfIn PDF document text
    • http://rokosarod.rf.gd/free_film_budget_template_for_mac.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_off0000c1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F0 5476 bytes
SHA-256: ba1aa43a6fe3452271229cddae2033265e6a3b34a25febdf532766b3f466fee1
font_01_sfnt_off0000d471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD471 11712 bytes
SHA-256: 9747675a9dc5c0000256b78aa158d74abc85ccfa0b1b621dd7b264f6f70ff0d9