Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a9c68c8ef015469…

MALICIOUS

PDF

72.1 KB Created: 2021-02-25 02:19:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 0104130fc29560af5846f7b67afbdc12 SHA-1: f3435a06000c58d3541e07b439b12984fe3136f9 SHA-256: 3a9c68c8ef0154699bdb9635ed18a518ef1c2dbc4de8e5626d1eab98ef56a642
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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://crophysi.ru/award?keyword=marvel+schebler+carburetor+tsx+34 In PDF document text
    • https://cdn.sqhk.co/rowazazapa/iidjifD/suwewepajurepemimalinaxif.pdfIn PDF document text
    • https://cdn.sqhk.co/takularozo/cjbjcgc/23397337109.pdfIn PDF document text
    • http://rimka.xyz/resumen_de_tus_zonas_erroneas7fd4s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453889/normal_5fc6a553e8d3c.pdfIn PDF document text
    • http://leree6.club/harman_advance_pellet_stove_specsy8ysp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417645/normal_6006f7351c687.pdfIn PDF document text
    • https://cdn.sqhk.co/pumafuki/xygfHja/zobazokizemaderudoxotul.pdfIn PDF document text
    • http://chategratis.online/dibevadosuo29ex.pdfIn PDF document text
    • http://mihetos.xyz/sql_server_dba_interview_questionsyzt3z.pdfIn PDF document text
    • https://cdn.sqhk.co/mozedizupi/hg7tW7d/protect_your_girl_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/FjbEFgh/domutiburasos.pdfIn PDF document text
    • http://koprovk.xyz/velebirifutegotasomadzgrx.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/BfhaRHu/black_wallpaper_art_dark_amoled_backgrounds.pdfIn PDF document text
    • https://cdn.sqhk.co/goganededem/MQjeicc/minecraft_earth_boost_mini_kaufen.pdfIn PDF document text
    • https://cdn.sqhk.co/litanamamusi/fjfiiJk/63826179216.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482863/normal_600df1b826858.pdfIn PDF document text
    • https://cdn.sqhk.co/vonofuguniti/jaWTWzL/51347739842.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/baxegezivumi/passive_with_by_simple_past_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/allotropic_transformation_of_iron.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/what_does_af_mean_on_maytag_dryer.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_off0000d77a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77A 5412 bytes
SHA-256: 93d0abe368d6795e1c3eb1feee4399c275b1276f34438f8e2f9e26f97eeefd54
font_01_sfnt_off0000e9f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F7 12900 bytes
SHA-256: 2cb6ac8fd572a422f831481eddb5b7eac19dba39a1ec3a373d9f0bc564c667d6

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