Malicious PDF — malware analysis report

Static analysis result for SHA-256 532406f2ecb8d904…

MALICIOUS

PDF

78.1 KB Created: 2021-04-30 19:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 80233e4c8309f41956729b6779700a4f SHA-1: 5b0b9dbd2ae7767afc5b05dae435d47a36998070 SHA-256: 532406f2ecb8d904db2a57100bd5aff416b165f4bcc7455c428105eac8f05f31
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 0.9991

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://leonvi.ru/strik?utm_term=does+costco+have+chest+freezers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406782/normal_606c7ac061736.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480893/normal_5ff1f265e31ed.pdfIn PDF document text
    • https://zifokodogip.weebly.com/uploads/1/3/1/3/131398222/4789166.pdfIn PDF document text
    • https://faporipito.weebly.com/uploads/1/3/4/6/134600592/woruvikom_pebijipasov_jenegelolupa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454825/normal_605a1343429cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481667/normal_602ffbb3a737c.pdfIn PDF document text
    • https://wazexusevawixi.weebly.com/uploads/1/3/0/7/130776334/rumumozakopiwub.pdfIn PDF document text
    • http://volazanuva.22web.org/48791442414.pdfIn PDF document text
    • http://pawusofadezozep.22web.org/facebook_lite_apk_update.pdfIn PDF document text
    • http://jolilibigir.22web.org/picsart_latest_version_for_pc.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/zidosozawok/vuxiximofepozed.pdfIn PDF document text
    • http://wavudipikudela.epizy.com/accountant_s_compilation_report.pdfIn PDF document text
    • http://kuxorexijamez.rf.gd/vlookup_in_excel_2020_with_example.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/the_giver_ch_14_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/99677518124.pdfIn PDF document text
    • http://lozedigoj.epizy.com/xedibebitid.pdfIn PDF document text
    • http://suteduzadu.epizy.com/how_to_study_for_ham_radio_test.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/como_aprender_ingles_basico_facil_y_rapido_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/kitofafebagonufufavo.pdfIn PDF document text
    • http://getakufo.epizy.com/accreditation_letter_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/american_king_size_fitted_sheet_measurements.pdfIn PDF document text
    • http://jamudux.epizy.com/63315936490.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/why_is_my_phone_not_registering_on_network.pdfIn PDF document text
    • http://tipopetudigovib.epizy.com/cash_flow_projection_template_for_real_estate.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/bihar_census_2011_bpsc.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_off0000f716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF716 5048 bytes
SHA-256: f7e0100f8394e9dd19b206440ad75cc9fe18ebe91c070f75a2e4a48dabd8baa5
font_01_sfnt_off00010856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10856 10000 bytes
SHA-256: 69d8fe32cda0d4f1a1cfe43534b0338507d090cae5e3b98b44a57c0fa1e00336

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