Malicious PDF — malware analysis report

Static analysis result for SHA-256 38fb9cff588c6812…

MALICIOUS

PDF

77.9 KB Created: 2021-03-03 07:32:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5137024c85c97a286128fbe57c071817 SHA-1: 11b9130bb499dee70a9b38a01e92d380bc102d95 SHA-256: 38fb9cff588c681225d749f5be7cef280145ed77ab3402b218f25c99317fc0d6
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/wix?keyword=pictures+of+lewis+and+clark+caverns In PDF document text
    • https://sukivafuxek.weebly.com/uploads/1/3/0/8/130874221/501777dfcedd.pdfIn PDF document text
    • http://mabay.fun/revheadz_engine_sounds_apk_fulli1tpv.pdfIn PDF document text
    • http://dressnbuy.com/audrey_carlan_serie_trinity_tome_1_bodym57ek.pdfIn PDF document text
    • http://jepewadagamer.scienceontheweb.net/how_to_change_battery_first_alert_9120b.pdfIn PDF document text
    • http://formblckr1.xyz/mijepivubabuxuneiax9x.pdfIn PDF document text
    • https://totamozosapopa.weebly.com/uploads/1/3/4/7/134712517/bavotabejitojojezi.pdfIn PDF document text
    • https://nawopudupavipe.weebly.com/uploads/1/3/4/8/134856820/b9ff5141dd.pdfIn PDF document text
    • http://terakusinuw.mypressonline.com/1240679038.pdfIn PDF document text
    • http://uscreditreport.info/kiwobosuzoruvepojige8z9z8.pdfIn PDF document text
    • http://coins24h.com/who_is_peeta_in_the_hunger_games_bookfp877.pdfIn PDF document text
    • https://lukogazusewof.weebly.com/uploads/1/3/4/6/134643336/japelokosozirupa.pdfIn PDF document text
    • http://duzusedolatepe.mypressonline.com/finding_your_inner_fish_summary.pdfIn PDF document text
    • http://erethiztzj.space/what_is_the_generic_structure_of_the_text_belowqd39o.pdfIn PDF document text
    • http://punejew.mygamesonline.org/dupawikomig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jotudokizer.onlinewebshop.net/lexukasukux.pdfIn PDF document text
    • http://pedirite.onlinewebshop.net/fefuxakaseje.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/mixefamirimaxepedene.pdfIn PDF document text
    • http://towawemigegi.epizy.com/ascorbic_acid_msds_sheet.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_off0000f569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF569 5232 bytes
SHA-256: 60047dbee586bfee3deac5be0146541094ececd91760d80e30cf2732a0897299
font_01_sfnt_off00010763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10763 10316 bytes
SHA-256: dfe1f0452046f3ff44b35bc86a98762209e068e6db7a5b7958d49081fd1846b9