Malicious PDF — malware analysis report

Static analysis result for SHA-256 d038f82fcf0e0eaf…

MALICIOUS

PDF

76.2 KB Created: 2021-03-22 10:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 98b413fcd6cd0835cef96500bda5b793 SHA-1: c78a87d9903928d2b90bd9038968c3570a5d555d SHA-256: d038f82fcf0e0eaf216dbbe8b4dd13331aed7df8deb06ea29d952c3b9e30f3e7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://botokaw.ru/award?keyword=manual+amadeus+basico+pdf PDF link annotation
    • http://ukranews.icu/11669494681lx9mo.pdfIn PDF document text
    • http://profit-makers.club/dexexidijupakegamudoejgg3.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/jUxJUAj/zireti.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/pathfinder_pawns_bestiary_box_3.pdfIn PDF document text
    • http://experiment.website/the_bronze_horseman_poem_analysiset9qk.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/hp_laserjet_1320nw_driver_for_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/hfjfThf/diduzivunituvetex.pdfIn PDF document text
    • https://cdn.sqhk.co/xudekutof/ghj7iiJ/69104395935.pdfIn PDF document text
    • http://groby-ritual.online/60988323058wv0xe.pdfIn PDF document text
    • http://optamorem.com/snowcat_ridge_ticket_pricesl2s3o.pdfIn PDF document text
    • http://ig-support-service.com/nfl_trade_rumors_washington_football_teamahefr.pdfIn PDF document text
    • http://bnl-jobs.com/beauty_and_the_beast_movie_download_in_dual_audio_720p0ds7x.pdfIn PDF document text
    • https://cdn.sqhk.co/bovutolomevo/jhRjjgh/dreamie_planner_app.pdfIn PDF document text
    • http://dobofozepop.mygamesonline.org/how_to_awaken_kundalini_shakti.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/importance_of_reliability_and_validity_in_research.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/hhdKjgx/doomsday_clicker_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvaratuji/m0IVgxD/34648539622.pdfIn PDF document text
    • http://cz-nitrof.website/dipapifanulipakudetir9axaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wazeniwemir.onlinewebshop.net/41541972730.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/32892635494.pdfIn PDF document text
    • http://sijadogif.atwebpages.com/35916158315.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/poulan_pro_blower_bvm200vs_air_filter.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_off0000e8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B8 5348 bytes
SHA-256: 5a91b01c5d4b72d139d5cafba6e156949524718128798c01d2b9a65879459a67
font_01_sfnt_off0000fae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE3 11964 bytes
SHA-256: ae10ab4de0b69139d03b0db03bfaff79b856ba427ca49cb9e67a2ceddc092d61

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