Malicious PDF — malware analysis report

Static analysis result for SHA-256 8964e2c7a85b01ef…

MALICIOUS

PDF

72.1 KB Created: 2021-02-25 17:31:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 380e85793f52673f1c67628d0901c9c8 SHA-1: 23661bf5e5c055788d55359ea6dea8f7a94926d9 SHA-256: 8964e2c7a85b01ef46c6b911ab19ed23813557f29f5cda3a26c70319825542ce
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/award?keyword=why+do+old+aspirin+tablets+smell+of+vinegar PDF link annotation
    • https://cdn.sqhk.co/kivuwutu/SleF90u/mifewoditaz.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/ujdhjiW/simple_ice_cream_recipe_heavy_cream.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/T5nSghL/frontline_commando_2_game_download_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/pisapaxosabo/dtgdchf/bubble_bobble_passwords_nintendo.pdfIn PDF document text
    • https://xinosete.weebly.com/uploads/1/3/0/9/130968926/tatogoxe_xijegevidaz_tefili_xofuvedawo.pdfIn PDF document text
    • https://rezigetofetima.weebly.com/uploads/1/3/1/1/131163738/4607599.pdfIn PDF document text
    • https://cdn.sqhk.co/raguwubives/gBkgNje/t_mobile_park_events_enchant_christmas.pdfIn PDF document text
    • https://cdn.sqhk.co/gojapawareke/iTgehew/73106720763.pdfIn PDF document text
    • https://cdn.sqhk.co/dilereku/sghjbCM/candlestick_trading_strategy_apk.pdfIn PDF document text
    • https://tutitobogin.weebly.com/uploads/1/3/4/4/134485970/d573990e7.pdfIn PDF document text
    • https://vorapitejure.weebly.com/uploads/1/3/4/6/134605364/2303350.pdfIn PDF document text
    • https://cdn.sqhk.co/navozaxezini/ifgojjr/lufukovupoganasoxaki.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/iage5wc/gifuteziselo.pdfIn PDF document text
    • https://cdn.sqhk.co/giwegulatil/Xia8him/tobinaxifukobisekoz.pdfIn PDF document text
    • https://nuzozixajalupik.weebly.com/uploads/1/3/0/7/130739607/beruximupija-rowodibojidoxa-borizodej-wopamemakomuvus.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/zetituri/flying_car_simulator_3d_game.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/bdo_witch_awakening_gear_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/18921911022.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/what_are_the_basic_beliefs_of_the_mormon_religion.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_off0000dc1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1A 5768 bytes
SHA-256: 4230a39fa399047833b1fe74934633105947280c9a852b16f0f8be764c28cb32
font_01_sfnt_off0000efaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAF 10424 bytes
SHA-256: 4d6bad529c715710abdcf6e8ff85728ab789bf9dac6efd3a1447f6d815cdbeb6