Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f4ad37cbf991c6…

MALICIOUS

PDF

72.7 KB Created: 2021-02-16 01:39:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 70ba81114800e1758eb73e06adf4fbca SHA-1: 59de22d8e892513e04ce9767bcf25a2f921569bc SHA-256: d3f4ad37cbf991c6103cb48f56ab68ead8d393a49cb0e6853fc9804a949a1f11
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://bologen.ru/123?utm_term=juegos+de+cinematica+fisica+y+quimica+2+eso PDF link annotation
    • http://dfds.in/lomubufx2rg.pdfIn PDF document text
    • http://scrlt.xyz/bavufivakazuxoluramufexcihbx.pdfIn PDF document text
    • http://retys.fun/baixar_jogos_para_ppsspp_gold_androidkxygn.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/L0jj3tB/desert_survival_shooting_game_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/mumesimasozo/5rjehcJ/62529398789.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/bJSphbD/bonedexexug.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/RrgdU4S/tujulofexagu.pdfIn PDF document text
    • https://vorebalulu.weebly.com/uploads/1/3/5/9/135962534/lifovig-toxoza-fajuxudit.pdfIn PDF document text
    • https://dikubudekoguzo.weebly.com/uploads/1/3/1/8/131857294/1435859.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/Rgj0kgf/77388467884.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/ggiKe3G/xajufekivijegam.pdfIn PDF document text
    • http://crysety.xyz/refractometria_en_leche7vndi.pdfIn PDF document text
    • https://cdn.sqhk.co/pimibopugugo/dXdidhi/final_freeway_2r_download.pdfIn PDF document text
    • https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/demorisopizopi_xakumezis.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/xomudufe/n64_emulator_ios.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_off0000da8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8A 5564 bytes
SHA-256: ad8c07907d029112cd59307f79d8464af969ad922a787c532e02cd1d2cd48d7a
font_01_sfnt_off0000ed6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6D 11900 bytes
SHA-256: 4cde89e89ebe40ab79ce655fb3311ce628b3a19a9f7ae81e647c752a0b070c1e