Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef37a062ac25c1f5…

MALICIOUS

PDF

67.2 KB Created: 2021-03-18 03:10:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 306f44b2ab9fee3a4bd48d57306f52bc SHA-1: e4bd12f073bde7414148955a6c333c069f509b7a SHA-256: ef37a062ac25c1f52c68322793cc10a6aac9a69680df108d0a6abde950eaa975
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://gimoguvi.ru/award?keyword=biblia+cristiana+para+ni%25C3%25B1os+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487409/normal_5fdc871cc0c45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489598/normal_5fefc5754e019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374371/normal_5fe1886593120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482027/normal_603668375c361.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366660/normal_5fe198514702c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473618/normal_60350ef28c261.pdfIn PDF document text
    • http://zesegalos.scienceontheweb.net/74992526281.pdfIn PDF document text
    • http://zereteleriw.getenjoyment.net/of_mice_and_men_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_602bf72c2350d.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/botedibubipiginupades.pdfIn PDF document text
    • http://fajufoturesu.sportsontheweb.net/97485466648.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_751484cda4ab447887d358144127c464.pdf?index=trueIn PDF document text
    • https://3465328d-eb21-4af5-a94e-b8fdacefaafa.filesusr.com/ugd/c63bf9_7753be03a9b74bce8980ee3aeaae3705.pdf?index=trueIn PDF document text
    • http://renimip.rf.gd/10429800641.pdfIn PDF document text
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_dcd89fc912ad4c7e9cb1d35616072ad8.pdf?index=trueIn PDF document text
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_09b672e30ae84f658b4e7d48abfc123d.pdf?index=trueIn PDF document text
    • http://rajamuviw.epizy.com/from_dusk_till_dawn_movie_hd.pdfIn PDF document text
    • http://zetulinug.rf.gd/71289642631.pdfIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_d3eea96858794cceaf13e9fd6db9bdfe.pdf?index=trueIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_333bf47b9c36438a96e1b63207a8c0c2.pdf?index=trueIn 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_off0000c5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A3 5552 bytes
SHA-256: 1bf3e3bec651fe177940a36c2987c818579a00faafd2538eff999d806afa9328
font_01_sfnt_off0000d84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84A 12104 bytes
SHA-256: 69bbc6cb970fa0499952b7faef26ac587aca47e7b501644f830b22288d801aa9

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