Malicious PDF — malware analysis report

Static analysis result for SHA-256 d205986b10552f96…

MALICIOUS

PDF

73.0 KB Created: 2021-06-06 17:54:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e77afd6109c64e053d4c6f59c4c93c68 SHA-1: ea5ee183c3baec5c6cc7937b68ec6e7165a34e39 SHA-256: d205986b10552f969852c6483c558712b7d75e3d3d1b616c2a2eb1eb5dc942a6
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 0.9991

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://cructi.ru/pbw?utm_term=how+much+is+usps+tracking+plus PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403533/normal_604f1adaa5073.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413363/normal_5fdf6601cafb8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wemilamozede.pbworks.com/w/file/fetch/144555009/wilorowobosid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/772ed5cf-4380-42d3-8cb6-394df442bf75/645750055.pdfIn PDF document text
    • http://jiboduxoguv.pbworks.com/f/intermediate_macroeconomics_multiple_choice_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f5420a7-9911-49c5-9e0e-f196acd8aa22/how_to_load_a_craftsman_electric_staple_gun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4b02f66-87f1-4336-be47-dc4050e7f3a2/nodunerewekilusarovof.pdfIn PDF document text
    • http://vadibun.pbworks.com/w/file/fetch/144436083/15951005867.pdfIn PDF document text
    • http://jujupaw.pbworks.com/f/73215417891.pdfIn PDF document text
    • http://zubipuwaf.pbworks.com/w/file/fetch/144516246/why_is_my_microwave_beeping.pdfIn PDF document text
    • http://tusawijer.pbworks.com/w/file/fetch/144444183/luxabogevofubenese.pdfIn PDF document text
    • http://wigiwopajuke.pbworks.com/f/69317917612.pdfIn PDF document text
    • http://pidexuxok.pbworks.com/w/file/fetch/144603441/kia_sorento_2011_service_repair_manual_free.pdfIn PDF document text
    • http://xojifot.pbworks.com/w/file/fetch/144426468/83050369001.pdfIn PDF document text
    • http://midevodimu.pbworks.com/w/file/fetch/144629811/pichuva_kaththi_tamil_movie_download_tamilyogi.pdfIn PDF document text
    • http://bukafag.pbworks.com/f/42296426368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f365a72-cccf-43c9-9901-14eebf066a45/what_are_the_4_nitrogenous_bases_of_dna.pdfIn PDF document text
    • http://xujefix.pbworks.com/f/90939678384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/413ffae8-f0d9-495b-b58e-8f94f8b4004d/14947013646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae0ee64e-c46a-4555-a982-a96a9fc342c6/bapokodap.pdfIn PDF document text
    • http://nugewil.pbworks.com/w/file/fetch/144620781/animated_infographic_powerpoint_template.pdfIn PDF document text
    • http://natutaliva.pbworks.com/f/solubility_curve_of_potassium_nitrate_lab_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7d621f4-4e52-4e2d-84d0-57f1c1a9ea7a/derivational_affixes_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e359cff-7449-4573-aa2b-2dbd05fdda20/what_is_required_to_enter_class_b_airspace.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_off0000ded8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED8 5464 bytes
SHA-256: 5e0624eac961c1c90749f77ffb4d48750cadfc69de9064d3bb947b551ba650e8
font_01_sfnt_off0000f154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF154 10784 bytes
SHA-256: 00cb02b08737ac8dcf3cc7bd3dedfa2edf93f9cf3d07817b1def26cc17dfea55