Malicious PDF — malware analysis report

Static analysis result for SHA-256 8548093992878f25…

MALICIOUS

PDF

78.8 KB Created: 2021-04-01 22:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 02b37efadc3114f958b4c374e6dfb679 SHA-1: 5b59fdd484afcf78c0016ea46eb06f55c57bf123 SHA-256: 8548093992878f256783ae5ade46ba7db80ae017c02285500cb628bf48f5370d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://dugedepap.ru/wix?keyword=methuen+town+hall+clerk PDF link annotation
    • https://cdn.sqhk.co/tedalome/yghghhg/xebumowunaxegugaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/guranotup/cohblib/851636436.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/jftAYm4/33249508058.pdfIn PDF document text
    • https://cdn.sqhk.co/jasorevujoxu/3uijrCb/64661570678.pdfIn PDF document text
    • http://xviiivbgz.com/the_holographic_universe_michael_talbot_ebookmc21y.pdfIn PDF document text
    • https://cdn.sqhk.co/nokodexuxof/aC95cqA/war_of_worlds_movie_online.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/G9iavRa/free_rider_hd_offline_editor_codes.pdfIn PDF document text
    • http://decideyouself.fun/nifunubarezepugodazamenelzmhh2.pdfIn PDF document text
    • http://metryck.info/adverb_ending_in_ly_hyphenbn7wb.pdfIn PDF document text
    • https://cdn.sqhk.co/pulovafafita/cAiejb9/2048_classic_legend.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/bggjjWo/guide_stack_colors_in_uno.pdfIn PDF document text
    • http://meetsoda.club/list_of_geronimo_stilton_books_in_ordercxf6b.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/cours_de_franais_niveau_b2.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/the_poisonwood_bible_genesis.pdfIn PDF document text
    • https://cdn.sqhk.co/gufadiviw/RJZ9ibX/notes_app_for_iphone_not_working.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/tayc_5_izleau0o5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nukivamo.myartsonline.com/past_simple_negative_form_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/narugegesonefiwubefof.pdfIn PDF document text
    • http://karapazixegipi.epizy.com/aptitude_questions_and_answers_with_explanation.pdfIn PDF document text
    • http://nanomunem.epizy.com/sap_crystal_reports_visual_studio_2017.pdfIn PDF document text
    • http://nevabaza.atwebpages.com/gauge_symmetry.pdfIn PDF document text
    • http://vawerudarasikow.myartsonline.com/what_is_the_starting_salary_for_an_international_business_major.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/1999_honda_accord_v6_transmission_rebuild_kit.pdfIn PDF document text
    • http://biratorusivise.epizy.com/kewodudakofug.pdfIn PDF document text
    • http://takodibunogudas.epizy.com/effectiveness_of_online_advertising_project_report.pdfIn PDF document text
    • http://bofofopefolag.epizy.com/54821309103.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/zipgrade_answer_sheet_20.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/student_registration_form_in_html.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_off0000f7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BE 4868 bytes
SHA-256: e2be0bb667aa53834ca3703a934e00eb7e25c9805616dd8903917341f34a0e27
font_01_sfnt_off0001085e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085E 11000 bytes
SHA-256: 1652edce71a397eb2e9cf0ff5ef89f6b7c62323a10b7d730af8d2570c0b8c87f