Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd16ae4ddabcd04…

MALICIOUS

PDF

68.0 KB Created: 2021-04-04 03:35:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e2bebe6035c56c7a4a6d9de55c729827 SHA-1: dab3053c8d10e6fce38f9d0a4866109c60de9f56 SHA-256: 7cd16ae4ddabcd042bc436afb6ec179b162c4d48d7522ee6159b9a774246bd12
166 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous suspicious URLs, including one that is an invisible link designed to lure the user to a potentially malicious domain. The PDF also functions as a link farm, directing users to various disposable domains, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://mezovuduw.ru/strik?utm_term=ram+dass+movie+netflix PDF link annotation
    • https://cdn.sqhk.co/ranamifujuki/hiGhbgy/walesi_bardok.pdfIn PDF document text
    • http://ginixotojaru.medianewsonline.com/artisanal_mining_in_zimbabwe.pdfIn PDF document text
    • http://baranaydin.org/what_is_the_triangle_offense_in_basketballp5gnv.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/anti_human_trafficking_organizations_austin_tx.pdfIn PDF document text
    • http://luxomozuk.mypressonline.com/burgers_zoo_plattegrond.pdfIn PDF document text
    • http://blaugrana.ru/how_long_study_for_dental_schoolf6gwo.pdfIn PDF document text
    • http://lnstagram-support.live/55877743369zzc2y.pdfIn PDF document text
    • http://verifybadgesbusiness.com/57823253049xz948.pdfIn PDF document text
    • http://tatemegedes.sportsontheweb.net/foxopon.pdfIn PDF document text
    • http://finonit.mypressonline.com/webasotinisusimebe.pdfIn PDF document text
    • https://cdn.sqhk.co/foxoxaze/jhY4khN/dufojoner.pdfIn PDF document text
    • http://sugoxebojun.getenjoyment.net/2847403282.pdfIn PDF document text
    • https://cdn.sqhk.co/rezalabobo/ihhdi5T/19220030211.pdfIn PDF document text
    • http://trysalon.xyz/what_is_tcp_ip_layer_model5ywv7.pdfIn PDF document text
    • http://sagedix.medianewsonline.com/47230824826.pdfIn PDF document text
    • http://azakalaza3.xyz/tonuvefagar.pdfIn PDF document text
    • https://cdn.sqhk.co/wopeporamo/a06zhbr/evolution_2._0_wwe.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/casio_outgear_sgw-100-2b_twin_sensor.pdfIn PDF document text
    • http://afracheat6.xyz/mimuwator2v8h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/025294b7-0948-4047-8654-91d18bf4fde8/top_books_to_read_2020_bill_gates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6808b02-8d75-4faf-81b6-68c3c978ec53/how_to_build_a_simple_tiny_home.pdfIn PDF document text
    • http://lufopudizomuv.atwebpages.com/french_adjectives_list_masculine_and_feminine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cd974e5-0db8-4f85-8e6c-98c2bdbcb9f6/which_garrett_metal_detector_is_the_best.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9fb3a60-8801-4e3f-85c3-3537891cb51b/laboratory_manual_for_anatomy_and_physiology_6th_edition_answer_key_wiley.pdfIn PDF document text
    • http://tumobuwixakeg.atwebpages.com/nutrition_in_gujarati.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_off0000ce80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE80 5092 bytes
SHA-256: 73b1910509d9360a4ad6413064f2253ce91502b0397f6365ee006b825dd093dd
font_01_sfnt_off0000dfd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD6 10204 bytes
SHA-256: 08926e9c2ef250e4b5ccaf7a5d5e019f71a2a599e8e6b07140ed9e74aaf78a81