Malicious PDF — malware analysis report

Static analysis result for SHA-256 237a0d8f7f244edf…

MALICIOUS

PDF

71.6 KB Created: 2021-02-16 02:21:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0b0c0d4dfbd9abd57aba8d68bf70ae1a SHA-1: 08c87390e5900900024230c2796340193cb45843 SHA-256: 237a0d8f7f244edfdeee3d865f88b8a889f52f031a664237d5478e5520d3d3e9
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://druttle.ru/wb?keyword=parkour%20games%20to%20play%20on%20roblox PDF link annotation
    • http://redpandarecycling.com/1609839281399xac.pdfIn PDF document text
    • https://zogabugopevaluz.weebly.com/uploads/1/3/0/8/130814784/1178571.pdfIn PDF document text
    • http://milanbeachs.space/surivojubokajesiphrx4a.pdfIn PDF document text
    • http://com-connexion.xyz/35167445955uf7qv.pdfIn PDF document text
    • https://vamukeroke.weebly.com/uploads/1/3/4/3/134353023/2716069.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/11082018136wbwke.pdfIn PDF document text
    • https://nawobelif.weebly.com/uploads/1/3/5/3/135307193/femanafavepovaz_nigagaveduvape_xuresevof_tupik.pdfIn PDF document text
    • https://retariluwefise.weebly.com/uploads/1/3/4/8/134858211/72a820adc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375340/normal_5feb6ccf7fe72.pdfIn PDF document text
    • https://lipigilukezi.weebly.com/uploads/1/3/5/3/135347924/mituregexetapolax.pdfIn PDF document text
    • https://petizigosi.weebly.com/uploads/1/3/4/9/134903326/9cdf83b77789da6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383678/normal_6016d4f5ee1c0.pdfIn PDF document text
    • https://rovinimowi.weebly.com/uploads/1/3/4/6/134682499/pexurenov.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/goneduzum/75497511639.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/7th_grade_common_core_math_practice_worksheets.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_off0000d780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD780 5512 bytes
SHA-256: 2bb1f52f0efa288cf2e68b3563f4f7b7fa62e93735eb7478b1b08a76845cac83
font_01_sfnt_off0000ea37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA37 11664 bytes
SHA-256: 9bcfbd43c5a3c192386f723a782c30bb4e6ef73edec851929fa46f60e3bab006