Malicious PDF — malware analysis report

Static analysis result for SHA-256 6efd0cf8240b9d5d…

MALICIOUS

PDF

73.1 KB Created: 2021-02-28 03:07:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b74b1b0c87a8f9ddf0bc5d32db54352f SHA-1: 78f4b37a7e3aeaf0051c19ee15cd3137d257572c SHA-256: 6efd0cf8240b9d5d07166cd9cb902529488257c234a69006324e31486615c931
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://midufefew.ru/award?keyword=canon+speedlite+580ex+ii+guide+number PDF link annotation
    • https://cdn.sqhk.co/wimiwupo/f3jdYY5/gun_range_near_me_open_sunday.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/JUcqkhf/sogebank_address_haiti.pdfIn PDF document text
    • https://cdn.sqhk.co/sewuvavimebi/tFijeif/tunnel_of_lights_colorado.pdfIn PDF document text
    • https://cdn.sqhk.co/lizupasepafu/JjfIVnW/nusotuxodejonimaxup.pdfIn PDF document text
    • https://nusewumu.weebly.com/uploads/1/3/2/7/132740482/nafuxegotolive.pdfIn PDF document text
    • https://cdn.sqhk.co/jenireni/cid6gju/milolamesirozad.pdfIn PDF document text
    • https://cdn.sqhk.co/migefareg/gcgjjbj/car_ultra_hd_4k_wallpaper_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/rigidaluta/h9tf02b/online_business_ideas_2020_philippines.pdfIn PDF document text
    • https://cdn.sqhk.co/miloxuso/AtgjXfk/disaster_will_strike_6_game.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/uwifw0E/skyrim_elder_scroll_dragon_id.pdfIn PDF document text
    • https://jetapixivokob.weebly.com/uploads/1/3/4/7/134726526/kivadokexo_gopasenabob_takuzusiwa.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/somamere/bobomeritebegura.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/chipping_campden_school_uniform_alcester.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/chess_king_apps_free.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_off0000df07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF07 5852 bytes
SHA-256: 828e4268067adeb67051939a249fc570f9c376d29d9e86fa005eee85d2c698e0
font_01_sfnt_off0000f2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D2 10572 bytes
SHA-256: 56d6fbafec34884c2754088c6d54d3869994a54ec90e24ed734117f1c6946601