Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5bc30407495e820…

MALICIOUS

PDF

70.9 KB Created: 2021-02-21 10:45:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6072bf695693598eeee611677102eda1 SHA-1: a5a54cb1f176df1c9bceda2842780c46c7c483e3 SHA-256: b5bc30407495e8203fb47974b747d9a032588212735a5a540a8552dbb563e645
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jacksth.ru/123?utm_term=what+household+product+kills+toenail+fungus PDF link annotation
    • https://nisaxiguxizi.weebly.com/uploads/1/3/5/3/135306566/a8068f1da0.pdfIn PDF document text
    • http://tubipegutadob.iblogger.org/xawajitilewerevugalo.pdfIn PDF document text
    • https://nozabuzewetuk.weebly.com/uploads/1/3/2/6/132683147/2f58880a1938.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/uNiiwjg/nelemokikexisomig.pdfIn PDF document text
    • https://nixixufusolawig.weebly.com/uploads/1/3/4/8/134882604/4223562.pdfIn PDF document text
    • https://cdn.sqhk.co/tixelila/gijj4lF/skate_jeans_90s.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/8iijbhh/54955875220.pdfIn PDF document text
    • https://begobaxu.weebly.com/uploads/1/3/5/3/135336669/2538690.pdfIn PDF document text
    • https://cdn.sqhk.co/pepegejivo/LhcH2id/heroes_and_puzzles_event_calendar.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/3251db51eb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485434/normal_5ff9dda68b433.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/faduxodiwo/ravpower_filehub_custom_firmware.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/40186006990.pdfIn PDF document text
    • http://dadojusox.epizy.com/79541191954.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/human_resource_management_strategy_and_practice_9th_edition_download.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_off0000d720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD720 5492 bytes
SHA-256: f231cd5bc235e6cc2c6460de2d00b5aaed9f3c0a890a871eead4f3c082480753
font_01_sfnt_off0000e9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DC 10732 bytes
SHA-256: f2640775e8667997d9d8a07b43fe772e6c86ce8e9edb9c3bc7ad0fa7dad68ae2