Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28cc994f2cc5871…

MALICIOUS

PDF

67.5 KB Created: 2021-02-15 18:55:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8c83459dba35048fbb8a286efe5edda3 SHA-1: cfeb47c157252e7c4d123214d292c8a2d0172819 SHA-256: e28cc994f2cc58718130fa22002c5d55a906cfa2866bb76f4e4a28acb4dc93ee
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://yafferge.ru/wix?keyword=fitbit+aria+2+scale+manual In PDF document text
    • https://static.s123-cdn-static.com/uploads/4379974/normal_60062d66cb8b6.pdfIn PDF document text
    • https://losuwasujiro.weebly.com/uploads/1/3/1/6/131637226/9986240.pdfIn PDF document text
    • https://vovamujif.weebly.com/uploads/1/3/5/3/135318660/8254896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379498/normal_600ce53118318.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450047/normal_5fde2182bdb26.pdfIn PDF document text
    • https://wakavofidokevi.weebly.com/uploads/1/3/2/6/132681750/98cb3c28f.pdfIn PDF document text
    • https://lasapiboxemifol.weebly.com/uploads/1/3/4/8/134865682/5d0d9473b8af7ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481673/normal_602387fc1eadd.pdfIn PDF document text
    • https://jumirusuvowelu.weebly.com/uploads/1/3/4/6/134632856/09ca2a164798.pdfIn PDF document text
    • https://kolagigeb.weebly.com/uploads/1/3/2/7/132741023/rixol_lekekumaxonev_junikajopojiwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493227/normal_5fd926e246157.pdfIn PDF document text
    • https://nugilura.weebly.com/uploads/1/3/5/3/135317706/bipupaxum.pdfIn PDF document text
    • https://motonikepo.weebly.com/uploads/1/3/0/7/130739202/kutipixokufuvedu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495055/normal_5ffe74aa65726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374188/normal_600d3727e8874.pdfIn PDF document text
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/3000509.pdfIn PDF document text
    • https://cdn.sqhk.co/gozafavapawu/hbUegdY/tips_to_pass_colorado_real_estate_exam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB16 5172 bytes
SHA-256: 0a736c599aca9e425882697af9ccea5527800aff486cb456ebbadb0461df3e78
font_01_sfnt_off0000dc9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9D 10260 bytes
SHA-256: 5073660a779bcca79ca6e65820bf4209a785b94b3f4807db08c2537840db166c

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