Malicious PDF — malware analysis report

Static analysis result for SHA-256 7179ff79798ee8aa…

MALICIOUS

PDF

91.3 KB Created: 2021-03-04 17:15:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b4f690eb0f45e6f14f46e37c1accb987 SHA-1: 9a9e2ae4600ec6ed08805daf5d2bdf186cf9da1e SHA-256: 7179ff79798ee8aaf0e7669eb43f044f00980cac8d06a9b7d864da4d00a1fe3a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. One of the primary URLs, 'https://fokemale.ru/strik?utm_term=what+are+the+three+relational+dialectics', is suspicious and likely leads to a malicious site. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The document body is heavily obfuscated and appears to be generated content, further supporting the malicious intent.

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://fokemale.ru/strik?utm_term=what+are+the+three+relational+dialectics PDF link annotation
    • http://xupokaxe.medianewsonline.com/37787235904.pdfIn PDF document text
    • http://nakodinita.scienceontheweb.net/fezixopubi.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/dell_precision_t5500_motherboard_form_factor.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/bgp_to_ospf_redistribution_configuration_example_juniper.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/the_chronicles_of_narnia_the_magicians_nephew_reading_level.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/how_to_be_successful_special_educator.pdfIn PDF document text
    • http://fumatiw.mypressonline.com/aws_interview_questions_and_answers_for_devops.pdfIn PDF document text
    • http://wugulisagu.iblogger.org/homelite_xl_12_parts_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dujisuga.epizy.com/aws_elasticache_cloudformation_template.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/wamivi.pdfIn PDF document text
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_c997b6fc40ba48ee87de26cf54985078.pdf?index=trueIn PDF document text
    • http://vaxutusurinav.epizy.com/booker_t_theme_music.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/im_barbie_girl_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/wizimebononuwumusexuxak.pdfIn PDF document text
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_f70a0203a2774a2fb7df88d3813975dd.pdf?index=trueIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_2f2aec981a9945a4bab5df9d8c6cf9bf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tapelu/44475942153.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/bulleya_remix_audio_song.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/tuzugewixutukagal.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/xuxafeluwujeli.pdfIn PDF document text
    • http://robebiwasufilu.epizy.com/sennheiser_ew_300_iem_g3_vs_g4.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/death_of_ivan_ilyich_themes.pdfIn PDF document text
    • https://14da0a27-f261-4d4b-8668-3a369f5c966d.filesusr.com/ugd/46429b_2cf5a3efe0264e62a32196bbb9e0904f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/88869343417.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_off00012a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6F 5040 bytes
SHA-256: 05a928ed04291c076ea56ec748f516d7cab9cb69a82c88d31e7bd1b382db6870
font_01_sfnt_off00013b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B91 10644 bytes
SHA-256: 7ebabf72589ab2073fe8a9dc6abb0fbff5f2c60fd90c485205b868b47723fe18

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