Malicious PDF — malware analysis report

Static analysis result for SHA-256 087679f9b29ada0c…

MALICIOUS

PDF

67.3 KB Created: 2021-02-19 07:49:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 35c111426449e20990716359968ca3c0 SHA-1: 34ec46630799f7a75e9a80b08d84b6f80069e8d6 SHA-256: 087679f9b29ada0c08512005c0f2d6a46471c6b4defd9ba4b44a7e6eeb4832e8
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://bologen.ru/wix?keyword=riddle+school+transfer+unblocked+games PDF link annotation
    • https://cdn.sqhk.co/gujuvizaja/jdhihji/ritajavitupatidif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447253/normal_5fd370815186d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377925/normal_5fc71b10c782e.pdfIn PDF document text
    • https://cdn.sqhk.co/tinupolureg/hfut879/microsoft_stream_download_video_plugin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375894/normal_6011ec24b17a9.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/iheijiv/mad_battle_royale_mod_apk_1._0._7.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/oggpdvo/greek_new_testament_audio_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/7jmidth/fast_food_places_to_eat_near_me_now.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/Hhf3jcw/64003981798.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481067/normal_5fd329604aa45.pdfIn PDF document text
    • https://jamekefexufi.weebly.com/uploads/1/3/4/8/134866820/rosaxixedus_fazalakub.pdfIn PDF document text
    • https://cdn.sqhk.co/jepipovi/ggUY5hh/street_of_rage_4_full_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427274/normal_6017f6d0202dd.pdfIn PDF document text
    • https://cdn.sqhk.co/jivaduzar/Bihco1H/zig_zag_stripe_discount.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ca8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8C 5648 bytes
SHA-256: 6c8f038ecb5d3c2b71075b7694ac77c8877f8a67d5e7bec8ea581cdd4eeb805f
font_01_sfnt_off0000dda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA0 10212 bytes
SHA-256: e36fc9f8a1b84232b3353384fb453fd82f1b9a9bc22d4cb1fb6c775232475b56