Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ee0b928f8622a7…

MALICIOUS

PDF

85.8 KB Created: 2021-03-24 23:19:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 893c5c37c0e058b6056df3c72b6d7cbe SHA-1: 89f485209a519ed56c0d3ceb89431cea5dbdc65f SHA-256: 88ee0b928f8622a7cc852c00b782d50067153e7c75c05e70fe61705cedcf758f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the primary URLs, 'https://bologen.ru/strik?utm_term=oscars+2020+ballot+printable+vanity+fair', suggests a lure related to the Oscars, while another, 'http://gofadivus.mygamesonline.org/azure_active_directory_features.pdf', indicates a link farm strategy. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/strik?utm_term=oscars+2020+ballot+printable+vanity+fair PDF link annotation
    • http://gofadivus.mygamesonline.org/azure_active_directory_features.pdfIn PDF document text
    • https://dalosetog.weebly.com/uploads/1/3/1/4/131412235/f426844.pdfIn PDF document text
    • https://lusenivusimutom.weebly.com/uploads/1/3/4/8/134887898/niwomelawumivoj.pdfIn PDF document text
    • http://xaredazisom.mywebcommunity.org/i_can_t_fight_this_feeling_anymore_piano.pdfIn PDF document text
    • https://pibulibeles.weebly.com/uploads/1/3/5/3/135324177/lawivadad-disunekijad.pdfIn PDF document text
    • http://zozeviremi.iblogger.org/69189920016.pdfIn PDF document text
    • https://tunozuranoba.weebly.com/uploads/1/3/5/3/135316660/fivegolak.pdfIn PDF document text
    • http://kprovk.xyz/most_common_chinese_male_names2bnh.pdfIn PDF document text
    • http://sigixexizo.sportsontheweb.net/huxley_admirvel_mundo_novo.pdfIn PDF document text
    • http://just-gopro.com/8577477299ku90f.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/zetubakuz/casio_ct-x700_keyboard_stand.pdfIn PDF document text
    • http://bitujiduruv.myartsonline.com/fifoperumad.pdfIn PDF document text
    • http://gelilofor.rf.gd/xewowaworo.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/9397332148.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/xokiniwotuvomunabi.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/deccan_chronicle_newspaper.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/ismart_shankar_movie_dialogues_telugu.pdfIn PDF document text
    • http://tumoxotakim.epizy.com/benifatupasumoputujerepur.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/birthday_greetings_photos_free.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/search_for_text_command_line.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/best_face_mask_sheet_for_combination_skin.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/breuer_condensed_font.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/lord_of_the_rings_return_of_the_king_won_eleven_oscars_fact_or_opinion.pdfIn PDF document text
    • http://poresiz.epizy.com/jozafom.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_off0001049c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049C 5612 bytes
SHA-256: cd2be67415dccbd19f003f60f8f3e05757f176bdddbfd54d4568cb41e0c35d13
font_01_sfnt_off000117c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C6 16448 bytes
SHA-256: 3703c5fde7682a384550408e9cfb0afcdece9c5b8bf0c30881dad4bad053e3c5

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