Malicious PDF — malware analysis report

Static analysis result for SHA-256 c131183400ece8e0…

MALICIOUS

PDF

64.8 KB Created: 2021-02-23 07:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 316213bbec7fe2409b9dbafa85c0f80c SHA-1: e8c9399ae7a1c3e65d1e73829b1c5c44b898b541 SHA-256: c131183400ece8e0d0c0e4fae66a46120708118301f7978789051e11505fa369
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/123?utm_term=black+ice+air+freshener+bulk PDF link annotation
    • http://discount50it.pro/half_of_odd_numbers_worksheetezf0o.pdfIn PDF document text
    • http://tricitysikhs.com/operational_transconductance_amplifier_nptelgaabd.pdfIn PDF document text
    • http://findssldz.xyz/jalofavaxazurumido7rdu.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/jdhgidQ/best_potential_players_fifa_20.pdfIn PDF document text
    • https://cdn.sqhk.co/nivodoruw/6jiiahb/mor_sansar_ma_cg_song_mp3_ringtone_download.pdfIn PDF document text
    • http://cparta.moscow/defensive_driving_course_test_answers_texaszf2uo.pdfIn PDF document text
    • https://cdn.sqhk.co/jadojibam/bZ3jhjL/capsule_wardrobe_men.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494147/normal_5fe5f5c26449c.pdfIn PDF document text
    • https://lokulubebu.weebly.com/uploads/1/3/1/8/131856352/xated-sabojuxonive.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481994/normal_602b27d3a4521.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/hijjjaz/doomsday_survival_bag.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/gjgibyn/amazeballs_3d_shortcut_run_block_puzzle_game_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389358/normal_5fcbf0cbe1576.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/zijhjcc/rockauto_promo_code_november_2020.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/muvazi/wiwebufazobiniwubuwulova.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_off0000c133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC133 5220 bytes
SHA-256: 2f9ef6ade0149dc0a942094abf61668ffaf5b3570486cd6aed67fa73d489ca5e
font_01_sfnt_off0000d2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F0 10380 bytes
SHA-256: c6aed122efcfd8acf2b052b132b7bf60f170027c5e5c78597e052ab6a0635b21

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