Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dfa1d180af0263e…

MALICIOUS

PDF

78.4 KB Created: 2021-04-27 02:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: aaab9298f2ec9a7cd96fb4fdfe4b5d3e SHA-1: 7ba457fbf6e919dbd2931b7a6d171f3980157229 SHA-256: 7dfa1d180af0263e1c824cf58af0252e36f5620b2eb2a7d5488d5c7fc5ef9476
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://lozipotod.ru/strik?utm_term=what+is+the+theme+of+when+i+was+puerto+rican PDF link annotation
    • http://anarchymedya.com/black_book_html_5.0_free_downloadj72z9.pdfIn PDF document text
    • http://posiximuteg.sportsontheweb.net/alimentos_altos_en_vitamina_c.pdfIn PDF document text
    • http://betuvunexe.22web.org/entrepreneurship_grade_11_deped.pdfIn PDF document text
    • http://nakanilo.club/fishing_rigs_for_sea_basszm868.pdfIn PDF document text
    • http://kiwedoro.66ghz.com/dugudijavujosanoj.pdfIn PDF document text
    • http://kvrovk.xyz/operations_management_is_applicable_mostly_to_the_manufacturing_sectorm74qy.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/zojidezuta.pdfIn PDF document text
    • http://itsnat.space/gazusutili32sb2.pdfIn PDF document text
    • http://safipewex.iblogger.org/vevupuwixiwe.pdfIn PDF document text
    • http://mynasert.online/how_many_questions_are_on_the_ged_test_20200mguf.pdfIn PDF document text
    • http://proba7.xyz/ruxivepekunerot6x3xw.pdfIn PDF document text
    • http://fesavuxofogegil.iblogger.org/mivivepewobuz.pdfIn PDF document text
    • http://tumerasiwabuzip.22web.org/welding_workbook_answers.pdfIn PDF document text
    • http://petrol-v-pol-price.site/wofejbf29r.pdfIn PDF document text
    • http://taptopbot.com/jeepers_creepers_1_full_movie_downloadg1ejx.pdfIn PDF document text
    • http://kamijuzexujap.iblogger.org/76941200390.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/38877340390.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/zuvovoxigumuz/longman_pronunciation_dictionary_for_upper_intermediate_advanced_learners.pdfIn PDF document text
    • http://vugopumoluzunu.rf.gd/dawekejusavub.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/kopidewevi.pdfIn PDF document text
    • http://tuzotulerijenej.rf.gd/deloxaxufugu.pdfIn PDF document text
    • http://sazevaxorofezag.epizy.com/folelefusesefaxunafap.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/33603941284.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/wanezimasanixidiligize.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/9_grade_vocabulary_words_and_definitions.pdfIn PDF document text
    • http://bawilifugoxak.epizy.com/37543769984.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_off0000f539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF539 5328 bytes
SHA-256: 41dc3fedda02d64214fa6bcfbe129b47610199f093925ab75ded27d539abc1ed
font_01_sfnt_off00010746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10746 10812 bytes
SHA-256: ad114ef94f204ecef82eba655688f3b310d0aef8be112f3865e36cfc252ea9d7

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