Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b79ea7b54f3e196…

MALICIOUS

PDF

72.9 KB Created: 2021-03-02 22:30:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 64a8597aa2b08dbda2ef60083ad61f55 SHA-1: f4bf19072c6602056126a9f7b72da2ef772847d5 SHA-256: 8b79ea7b54f3e1964ef9afefae2305532cb05201a6020fc42b61c3de2d3374f0
304 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://tiwebusimevadeb.weebly.com/uploads/1/3/5/3/135346158/pirofabajeb.pdf.
  • 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.
  • 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://yafferge.ru/award?keyword=how+to+reset+disabled+iphone+without+computer In PDF document text
    • https://tiwebusimevadeb.weebly.com/uploads/1/3/5/3/135346158/pirofabajeb.pdfIn PDF document text
    • https://juzowesefuzifi.weebly.com/uploads/1/3/0/7/130775985/dijumoro.pdfIn PDF document text
    • https://mojogobiwed.weebly.com/uploads/1/3/4/7/134747953/foxovuzo.pdfIn PDF document text
    • https://cdn.sqhk.co/bonosexov/fDjjLNq/substance_views_api.pdfIn PDF document text
    • https://cdn.sqhk.co/rureroso/hwjYjf8/electrical_transformer_calculations_formulas.pdfIn PDF document text
    • https://cdn.sqhk.co/nulaliki/haSeUpO/super_stylist_mod_apk_unlimited_energy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391623/normal_5ff02d21c9ef2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444353/normal_6033066b93821.pdfIn PDF document text
    • http://jezuxomanitabi.22web.org/agatha_christie_poirot_halloween_party_cast.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461497/normal_5fe4b8c4112b8.pdfIn PDF document text
    • https://cdn.sqhk.co/xidatelo/g7chiha/zinisenamel.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/hjggjhg/raneb.pdfIn PDF document text
    • https://cdn.sqhk.co/perekowemo/iedAljg/kroger_weekly_ads_nashville_tn.pdfIn PDF document text
    • https://cdn.sqhk.co/dagosasojo/fqESjjZ/wingstop_coupon_code_free_delivery.pdfIn PDF document text
    • https://cdn.sqhk.co/wigalefu/ijxOBjd/bts_wallpaper_hd_photos_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490523/normal_6036b7da0acf7.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/gdxjbzz/teamfight_tactics_league_of_legends_strategy_game_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/mojuzizimu/ibNiavG/space_invaders_alien_art.pdfIn PDF document text
    • http://vuwusud.iblogger.org/xozimeriwuladewe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wozabuposeg.epizy.com/clarivate_analytics_journal_citation_report_2018.pdfIn PDF document text
    • http://kezepinaxozegom.epizy.com/what_is_phrasal_verb_with_example.pdfIn PDF document text
    • http://wivukirotodit.epizy.com/can_ufc_4_be_played_on_ps5.pdfIn PDF document text
    • http://bitizadixiriwen.epizy.com/vekivapejesuren.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_off0000e09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09F 5504 bytes
SHA-256: 9a40764a861d8c4cc70acc9c1b82fe6aa1a5a4afa556a076c8fd2db17629927e
font_01_sfnt_off0000f334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF334 10240 bytes
SHA-256: 5f2ef30f8d80cba631555126dfd350fd39b13038fe5a56c54711523e05b64246