Malicious PDF — malware analysis report

Static analysis result for SHA-256 937ccdbca2e8a9da…

MALICIOUS

PDF

76.6 KB Created: 2021-03-03 02:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1fa59fb0ef521b82c9ccf88238d1673d SHA-1: 48f20dfb463658f83822e705d39165a09b6c650d SHA-256: 937ccdbca2e8a9da2728171be4e13337fbc3b467a8c63b04d6bfba142163cb0c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/award?keyword=ozeri+precision+digital+bath+scale+manual PDF link annotation
    • http://zuduwamani.mypressonline.com/how_to_hide_adjustable_bed_base.pdfIn PDF document text
    • https://barigager.weebly.com/uploads/1/3/1/3/131398159/2d50250cd9a6a93.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/KejdqtP/download_game_clash_royale_mod_apk_revdl.pdfIn PDF document text
    • http://servicesforsupport.com/sedizizebodotiratokodidu0u6ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499309/normal_6008fdb5cbf48.pdfIn PDF document text
    • https://xinuluparos.weebly.com/uploads/1/3/0/9/130969110/403036.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414486/normal_600075253b82b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413374/normal_6017f7c82570b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426972/normal_5ffbc8b0a2d10.pdfIn PDF document text
    • http://zoom-omsk.ru/how_to_make_velocity_vs_time_graph_in_excely4m8n.pdfIn PDF document text
    • https://bukalabak.weebly.com/uploads/1/3/4/4/134488518/57343.pdfIn PDF document text
    • https://wemezixogasowed.weebly.com/uploads/1/3/1/6/131637562/723583.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/heidZx7/pivoje.pdfIn PDF document text
    • https://zodaribidibukez.weebly.com/uploads/1/3/4/7/134716266/1437725.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://medazupu.onlinewebshop.net/elementary_english_teacher_interview_questions.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_off0000eca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA3 5704 bytes
SHA-256: 2b7c92c8f384c05453c28dcd4238f82980ee1b6845644e202dbe90e09b0d0b76
font_01_sfnt_off0000ffe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE0 11060 bytes
SHA-256: 9477af8eac2010f81fed27a8fcca2ece66ddd3955a83194e76288e4a5649f119