Malicious PDF — malware analysis report

Static analysis result for SHA-256 3deaf4767020936b…

MALICIOUS

PDF

71.2 KB Created: 2021-03-25 15:45:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f1df92269698b389c66685dd745dd50c SHA-1: 1e8ba9ed9669d2bb15df3fbd90534b5f92a012bd SHA-256: 3deaf4767020936b979a1ae328a75712be49d30e7bf65deb34c1188fab40ef9e
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 0.9998

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://midufefew.ru/wix?keyword=yorba+linda+fit+body+boot+camp PDF link annotation
    • https://cdn.sqhk.co/powurejur/83jhgcm/modern_train_driving_simulator_train_games_2020.pdfIn PDF document text
    • http://samemere.mygamesonline.org/asciidoctor_gradle.pdfIn PDF document text
    • https://cdn.sqhk.co/gokarunedod/QKBgdKq/sad_wallpaper_hd_boy_shayari.pdfIn PDF document text
    • http://novazeku.mygamesonline.org/medical_representative_training.pdfIn PDF document text
    • http://sozaxesugoj.mywebcommunity.org/the_adventures_of_huckleberry_finn_summary_chapter_14.pdfIn PDF document text
    • https://cdn.sqhk.co/lojadisexudo/giEhfgi/68100315836.pdfIn PDF document text
    • http://tezoxefakalexo.sportsontheweb.net/dapukavopex.pdfIn PDF document text
    • https://cdn.sqhk.co/savadapo/hihfhc4/xaselonunixonovodiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jajogagek.atwebpages.com/27673319809.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/printable_monthly_calendar_july_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/20267966428.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/does_neurofeedback_therapy_really_work.pdfIn PDF document text
    • http://lagunuriteg.rf.gd/delhi_metro_map_master_plan_2020.pdfIn PDF document text
    • http://fadudenomo.onlinewebshop.net/beanie_pattern.pdfIn PDF document text
    • http://repeputowuz.epizy.com/xbox_360_live_error_code_8015d000.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/7102360365.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/how_do_i_write_a_letter_of_recommendation_for_an_employee.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_off0000d752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD752 5328 bytes
SHA-256: bfc7e8291d16d5aeaf98fa4b2e57dd72b14b14491bcaf89c28ed923606f868a7
font_01_sfnt_off0000e95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95F 11204 bytes
SHA-256: 5c9f6fde88a03ceec01c4869bbdc62f24b12794c35836d7509dc30e21c8f75f7