Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0312b3c1935aff0…

MALICIOUS

PDF

79.7 KB Created: 2021-03-06 10:52:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9e4a2167321d3a441d4e7de08c621847 SHA-1: 3b04be95254cd166a2700c58ba814ae991e3d951 SHA-256: a0312b3c1935aff09647731016fc216b7a3c9374e3dac5673da75cc31213e1cc
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest malicious content, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://nipisod.ru/strik?utm_term=gta+san+andreas+cheats+ps2+superman+mod PDF link annotation
    • http://mabojexovepa.22web.org/carisma_coyote_manual.pdfIn PDF document text
    • http://zugemenelil.medianewsonline.com/maze_runner_the_death_cure_movie_download_in_hindi_720p.pdfIn PDF document text
    • https://dowanudamedi.weebly.com/uploads/1/3/1/3/131398164/f5c5faec1b.pdfIn PDF document text
    • https://bigevavez.weebly.com/uploads/1/3/4/0/134016854/7476779.pdfIn PDF document text
    • https://rilemiwekeb.weebly.com/uploads/1/3/4/5/134599700/7726c.pdfIn PDF document text
    • http://nitapida.mywebcommunity.org/how_to_set_tension_on_scroll_saw_blade.pdfIn PDF document text
    • http://zafotebobivet.iblogger.org/36165952768.pdfIn PDF document text
    • https://taxinureku.weebly.com/uploads/1/3/0/8/130814469/gosekubabawor_vanazefadavemiz.pdfIn PDF document text
    • http://xovijezup.mywebcommunity.org/excel_spreadsheet_templates_for_tracking_services.pdfIn PDF document text
    • https://nibadaxolakawub.weebly.com/uploads/1/3/4/8/134882114/jurebazole_fiwemat_xotek.pdfIn PDF document text
    • http://jezolagewe.iblogger.org/sony_receiver_str-ks360_manual.pdfIn PDF document text
    • http://nubebukexowi.66ghz.com/akira_full_movie_english_dub.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/dapapivemasimaxazakadaven.pdfIn PDF document text
    • http://zijozarub.mygamesonline.org/54736943021.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://getetir.epizy.com/burger_king_app_get_free.pdfIn PDF document text
    • http://zisafaziga.epizy.com/nitrogeno_caracteristicas.pdfIn PDF document text
    • http://judiserod.onlinewebshop.net/comptia_a_certification_all-in-one_for_dummies_4th_edition.pdfIn PDF document text
    • http://sufazomewugexu.epizy.com/best_volume_booster_app_for_android_2017.pdfIn PDF document text
    • http://tixofimisupabev.onlinewebshop.net/download_spyhunter_4_full_version.pdfIn PDF document text
    • http://riwevanopa.epizy.com/cub_cadet_lt1050.pdfIn PDF document text
    • http://jokilezitewoj.epizy.com/tegewibekuput.pdfIn PDF document text
    • http://xinudigiwuwa.epizy.com/fizobaxodilavodoxadituzak.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABB 5276 bytes
SHA-256: c0147337ebb46d603e846c99688c583d56fb05d4f471d2b683890919b7d2c3f5
font_01_sfnt_off0000fc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC78 11336 bytes
SHA-256: 76d0014c69837f924103282886b56c3f3664719da6a6fe51916b481ad9c3a6f3
font_02_sfnt_off00012321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12321 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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