Malicious PDF — malware analysis report

Static analysis result for SHA-256 47dcf2d32d0907ac…

MALICIOUS

PDF

79.4 KB Created: 2021-05-07 06:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ef3956f24f51f67ad25b773c0120d3f0 SHA-1: 165ac815f936455925e099bde7107e3652059a6c SHA-256: 47dcf2d32d0907acd69d85406f8cf71d941bd8e22c0ecc03c3e6716b92238f01
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=what+were+the+three+major+causes+of+the+french+revolution PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408195/normal_5fe6e60feaafd.pdfIn PDF document text
    • https://tibefuwejar.weebly.com/uploads/1/3/4/3/134332688/wimabotirov-ruvobavilis-vutawebonez-zuvexotufug.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/hfwwiaK/memuvozuralovujasamusoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366008/normal_5ff40a2dddeda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382413/normal_600ef3439b7a0.pdfIn PDF document text
    • http://servempieza.site/digital_marketing_company_in_salem8ik2h.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/idHoND1/bling_clock_timer_free_download.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/aircraft_maintenance_engineering_colleges.pdfIn PDF document text
    • http://findfreegirl.com/tri_fold_brochure_templates_for_photoshopabmv2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451766/normal_6048c18d54cbd.pdfIn PDF document text
    • https://xonedanafesiliw.weebly.com/uploads/1/3/4/6/134633415/sexipur.pdfIn PDF document text
    • https://cdn.sqhk.co/piredonina/0jdlRgj/pico_question_examples_gestational_diabetes.pdfIn PDF document text
    • https://cdn.sqhk.co/setinapas/Gigj7Ed/color_printer_test_sheet.pdfIn PDF document text
    • http://suwadebizon.mywebcommunity.org/purified_water_specification.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453100/normal_601912dfd4521.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/jezekemunidup/fesopidubudexuvedav.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/what_is_the_top_speed_of_a_scooter.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/nisomodiwulazike.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/jesosaguladota.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/sylvia_day_books_ranked.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/police_report_number_online.pdfIn PDF document text
    • http://vilatelisoto.onlinewebshop.net/diccionario_strong_espanol_online.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_off0000f971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF971 5360 bytes
SHA-256: 95b5cabe3788c239cec308ab5b71d80715a4d3fec1259dcec2baa86bf9d35558
font_01_sfnt_off00010ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA0 10740 bytes
SHA-256: b23058515742670d93663e7d6ade9b639d575cf8e14bce9650b03a56198bf93a

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