Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af5235a03ad3065…

MALICIOUS

PDF

71.4 KB Created: 2021-03-14 12:31:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8b10ed89bacb33bec98af648ee16eb1e SHA-1: 4cc947447371e0cbba1f4c255bd3c73abfcd69fb SHA-256: 9af5235a03ad306579fb44fcd932e08ec4392751883f39ea21964fc20adfe7c7
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links pointing to known malicious redirector infrastructure and disposable hosting, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier also flagged the PDF with high confidence. The embedded links are designed to lead users to potentially harmful websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=netgear+wgr614+v6 In PDF document text
    • http://dapajurop.mygamesonline.org/977002.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/definite_and_indefinite_articles_exercise.pdfIn PDF document text
    • http://lighterusb24.site/subgame_perfect_equilibrium_examplesdjukf.pdfIn PDF document text
    • http://nijeratazuw.iblogger.org/is_the_bitcoin_revolution_legit.pdfIn PDF document text
    • http://4escam-bot.online/whirlpool_wtw5000dw1_owners_manualhatx7.pdfIn PDF document text
    • http://stylecurtains.com/the_complete_idiot27s_guide_to_music_composition_downloadtmgmc.pdfIn PDF document text
    • http://madalez.22web.org/81127634743.pdfIn PDF document text
    • http://usejus.club/betokebupalemapojefupaluxbemqx.pdfIn PDF document text
    • http://dommasters.site/macbeth_free_will_quotesf7urs.pdfIn PDF document text
    • http://heliusdesign.ru/precalculus_projects_for_high_school8jkgb.pdfIn PDF document text
    • http://tells.fun/vopanagekokinodaph7atj.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/guvovigo/laserulon.pdfIn PDF document text
    • http://niwimugosaz.onlinewebshop.net/9926044108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69c0ba1e-0b32-4f1a-aae0-a274e40933a0/acido_nitrico_formula_di_struttura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a059d8b3-f7c6-40de-9c39-4d90e8c33b62/it_will_be_fine_meaning_in_bengali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9f4ab46-a8f1-4087-a1f8-c14af5d53979/the_organisms_in_an_ecosystem_are_called_abiotic_factors.pdfIn PDF document text
    • http://kugukokoner.myartsonline.com/sozikeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b716b4c3-e7f6-4f6c-9177-dae049c4f207/71134487101.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/accounting_software_tally_9._2_free.pdfIn PDF document text
    • http://dulibunaxojomo.rf.gd/video_orkes_om_adella_terbaru.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_off0000db5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5F 5060 bytes
SHA-256: c30164e2fc338bbc99d14f2240c00079d9f25bcd5a5893ea6ba70455d7086dfb
font_01_sfnt_off0000ecd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD3 10516 bytes
SHA-256: 6fcbf6d771c693b0ff5195d4bfb642fb956bc63ebf1776c17f08ad8c2e678306

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