Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58ddd31b78458a6…

MALICIOUS

PDF

72.5 KB Created: 2021-02-15 09:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a9e04421ad6ce4da0767905b073e69d4 SHA-1: 943c7cc339db86ca2b13c3127760a8094bcf5528 SHA-256: e58ddd31b78458a61b2fb9378b20df76fb5dd6f82c5e9896ff4b57b802c37cda
244 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=valvula+de+escape+psicologia In PDF document text
    • https://butilitari.weebly.com/uploads/1/3/3/9/133997497/zuzizewip.pdfIn PDF document text
    • https://girewatadetax.weebly.com/uploads/1/3/2/6/132681062/7811514.pdfIn PDF document text
    • https://cdn.sqhk.co/munenetifu/Diejaii/pixel_heroes_battle_royale_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xajimujigaju/jqdjiDx/13550207893.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387703/normal_5ffcddd43d408.pdfIn PDF document text
    • http://felepuregivo.iblogger.org/bipusobibosilanifubilud.pdfIn PDF document text
    • https://ganokupojedozo.weebly.com/uploads/1/3/4/8/134890080/jukes_sapiroxupazaw_zudimajot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377928/normal_5ffc222cc6751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457279/normal_5fdbb3f517149.pdfIn PDF document text
    • https://cdn.sqhk.co/ropesuzuruf/jigf1Ts/4175765154.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/aiafLjj/bugegusufopig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475196/normal_600fb14fc2ead.pdfIn PDF document text
    • https://nogomikosisodop.weebly.com/uploads/1/3/2/6/132681488/96e27d68e.pdfIn PDF document text
    • https://metoxuxiduwano.weebly.com/uploads/1/3/1/6/131636764/jovurivusisujidesodo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://valamujunitun.epizy.com/al_quran_madinah_terjemahan.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_off0000dfe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE0 5172 bytes
SHA-256: bbbf1a34c75d781712e0ecdf7d5e80f71d50ad3a345dcb7ebe319c9d2d6298e2
font_01_sfnt_off0000f19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19A 9904 bytes
SHA-256: 1aa08210d7a8c1ef9dbca279b619cfe3e83158192f947a4b442a0e9a45160107

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