Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e8c73fbc6b3a529…

MALICIOUS

PDF

80.2 KB Created: 2021-04-01 16:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 94c9a96a8675003dd094f67fab7c0ac0 SHA-1: 6186f850ed654fc8814c298525d7d8cd9709a1c3 SHA-256: 6e8c73fbc6b3a529af5bc728b9a2dfdb5be012a9d86cd6246a2cba431ac80ad3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://lozipotod.ru/award?keyword=appareillage+niko+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424328/normal_600e9d205388d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482617/normal_602c71b336a58.pdfIn PDF document text
    • http://juilopkiretlo.ru/xidosaluwepeluxavj9h.pdfIn PDF document text
    • https://cdn.sqhk.co/jagejope/hgzhaig/top_ringtones_2020_instrumental.pdfIn PDF document text
    • http://djami.ru/remejewexej4xl93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451574/normal_6003dbc575cc5.pdfIn PDF document text
    • https://cdn.sqhk.co/rozopebak/MjemVje/freebies_validity_meaning_in_tamil.pdfIn PDF document text
    • http://fb-copyright-help-from.com/calculus_related_rates_problems_and_solutionsto4xw.pdfIn PDF document text
    • https://xemegejimeje.weebly.com/uploads/1/3/1/6/131636808/zusosivotetakebinum.pdfIn PDF document text
    • http://uspeh.icu/journal_entries_with_gst_class_11_questionsodftd.pdfIn PDF document text
    • http://natlab.ru/fosinugizegipidegateljdkot.pdfIn PDF document text
    • http://mebelrostov.ru/graco_snugride_30_expiration_canadavhhd2.pdfIn PDF document text
    • https://tizupokewa.weebly.com/uploads/1/3/4/0/134013062/tanapilo_jufilixozib_winitikejefuz.pdfIn PDF document text
    • https://cdn.sqhk.co/zapusukajev/jj5lOaF/rirurivigolokusimetukopew.pdfIn PDF document text
    • https://cdn.sqhk.co/vubiwete/d2Z0fhi/mulufufetafafidafin.pdfIn PDF document text
    • https://cdn.sqhk.co/xetilibul/duKtd61/download_badminton_league_mod_apk_2020.pdfIn PDF document text
    • https://mekumago.weebly.com/uploads/1/3/5/9/135981587/zunejurafesok.pdfIn PDF document text
    • http://about-igsupport.com/muledoralexavukedusezonu4l030.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459788/normal_5feb7cbd942af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371005/normal_5fcc7647d3a0e.pdfIn PDF document text
    • http://italy50wow.pro/call_break_multiplayer_card_game_downloaddbk2t.pdfIn PDF document text
    • http://ketadiets.site/biochar_carbon_sequestration8onvt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF953 5084 bytes
SHA-256: 94f92432e93f4a8f612cc377650e88f365bef2dcfb773fe0a8b1c2d5377ac662
font_01_sfnt_off00010ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB2 12484 bytes
SHA-256: 6542840b0c42cc2b11a9e6c42f99913b66193f0a51bb08602d0e27bc20f3164a

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