Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2f266d22437977…

MALICIOUS

PDF

60.8 KB Created: 2021-01-26 21:26:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 1d4af32e5fd003fe4ddda7d665d8cacf SHA-1: e526d441826c993130e367a9de7f9893b5c11a73 SHA-256: dd2f266d22437977ad313174748acc38280d5879219cb88ac1ef4aea5b01c8aa
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/123?utm_term=ap+statistics+chapter+9+test+form+a+answers PDF link annotation
    • https://cdn.sqhk.co/dolavalof/Tjejbid/toca_lab_elements_how_to_play.pdfIn PDF document text
    • https://gisafonenum.weebly.com/uploads/1/3/5/3/135323636/5489771.pdfIn PDF document text
    • https://cdn.sqhk.co/toralapiluw/PjgiisU/download_devil_ninja_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/ifZW3jh/zexarulalalulur.pdfIn PDF document text
    • https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/dunixe.pdfIn PDF document text
    • https://cdn.sqhk.co/belumozobu/hoha8Mv/black_ops_cold_war_warzone_map.pdfIn PDF document text
    • https://cdn.sqhk.co/xiladuxe/gBY9dQH/60135995976.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzudulo/fhigcJH/racing_in_city_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/raninogozo/WgbijO7/3352112010.pdfIn PDF document text
    • https://cdn.sqhk.co/pevukoza/jgCahct/cut_sound_from_video_app.pdfIn PDF document text
    • https://xuredetinumimo.weebly.com/uploads/1/3/4/6/134630251/wimowalowig_miwobed_latofod_jiraserev.pdfIn PDF document text
    • https://takadoturig.weebly.com/uploads/1/3/4/1/134108809/fajewokawiw.pdfIn PDF document text
    • https://cdn.sqhk.co/volumusigu/rFgmhiN/xosadixefirejuwowodenoven.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/tapelu/wheels_on_the_bus_cocomelon_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/bjt_biasing_techniques.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_off0000b3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C9 5460 bytes
SHA-256: 52dbee957e8db3bafcd6a563a64514fa69a5e72ed8e6b738da7d249c2af3ab05
font_01_sfnt_off0000c63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63F 9380 bytes
SHA-256: 4bdeb8c3c4fb62e05ae070fbacaff758f8738c5e442c973205fcc286fb52d6e3