Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2241bd34fd3aadf…

MALICIOUS

PDF

76.9 KB Created: 2021-02-19 19:27:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1882a761dccae3d0226856469f6ddfba SHA-1: 83c2968a9a8f0c87f0f28f54d8b15c0feb730796 SHA-256: c2241bd34fd3aadf541d4736b0e76da8e46742df56af370341f8ca48978bece4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable domains and are associated with link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=what+types+of+sexualities+are+there PDF link annotation
    • https://cdn.sqhk.co/ludibipimilu/hco5Phg/chinese_checkers_2_player_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/rilixuzewiv/jijg5GQ/54498926464.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzufoxo/egjghhe/fuvufikenerogijaguzogomum.pdfIn PDF document text
    • http://freud.icu/89710159608dkgls.pdfIn PDF document text
    • http://remont-pc.website/99997396871nrlgc.pdfIn PDF document text
    • http://losmopaka.site/pafafizogetipixew4hvi.pdfIn PDF document text
    • https://cdn.sqhk.co/pevedapev/chjoxFQ/spectacles_testicles_wallet_watch_nuns_on_the_run.pdfIn PDF document text
    • https://cdn.sqhk.co/kelanadu/ljb9FHd/mogaror.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/jUhdiit/12688141544.pdfIn PDF document text
    • http://koteyarn.moscow/clash_of_clans_level_6_layoutdg5zf.pdfIn PDF document text
    • http://abzac.me/truck_simulator_europe_2_mod_apk_downloadatkl3.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/why_does_sodium_chloride_have_a_high_electrical_conductivity_when_moltenfpmsp.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/eVvgcgd/viking_places_names.pdfIn PDF document text
    • https://cdn.sqhk.co/tazakabebilo/2RyigrD/bupironotujelaluzudisejas.pdfIn PDF document text
    • http://blablablacar.online/cepten_bedava_krte_mzik_indir58itq.pdfIn PDF document text
    • http://myfirstsite.xyz/mesaduqgy8n.pdfIn PDF document text
    • http://deflecfcvy.best/strategy_and_tactics_magazine_current_issue0v2o9.pdfIn PDF document text
    • http://legiontry.online/what_are_names_of_starsefvs5.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/dhjjibx/criminal_files_investigation_special_squads.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/xamibebulosaxug/bootstrap_modal_form_ajax_php_mysql.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/89379979214.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/camtasia_studio_for_windows_10_free.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/minafululubogezeramodif.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_off0000f05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05D 5172 bytes
SHA-256: f16fc514f3fd159aff218a3b34bf13b293c40b13c6c3da39936975feca3cbfb1
font_01_sfnt_off0001020b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020B 10816 bytes
SHA-256: 38efb3fcaac406d609c87a2d4a90d28c1460e21b16916056e25954b23412dd10

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