Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbdfd2667f8e2bed…

MALICIOUS

PDF

43.4 KB Created: 2020-10-03 04:25:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6ab61f1a4d01ed568eb4f865c4d128de SHA-1: b3300088029560ffbed81a9526cb24a82e6b66e4 SHA-256: fbdfd2667f8e2bed7d5f06df34c7c8c36ebd5df402912964d6380d32632e522a
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://cctraff.ru/strik?keyword=ielts+upgrade+8+listening+test+2+answers In PDF document text
    • https://site-1037911.mozfiles.com/files/1037911/64634555407.pdfIn PDF document text
    • https://site-1037010.mozfiles.com/files/1037010/73737717975.pdfIn PDF document text
    • https://site-1040888.mozfiles.com/files/1040888/61869771778.pdfIn PDF document text
    • https://site-1038303.mozfiles.com/files/1038303/86032355497.pdfIn PDF document text
    • https://site-1036691.mozfiles.com/files/1036691/27121280600.pdfIn PDF document text
    • https://site-1042992.mozfiles.com/files/1042992/zinofolamawidugi.pdfIn PDF document text
    • https://site-1037228.mozfiles.com/files/1037228/sowinokosojaka.pdfIn PDF document text
    • http://files.lifestylefaceandbodycare.co.uk/uploads/1/3/1/1/131163601/d67dfe6a1457ae.pdfIn PDF document text
    • http://binanut.amershamaccommodation.co.uk/uploads/1/3/0/8/130814225/60823a5.pdfIn PDF document text
    • https://site-1036685.mozfiles.com/files/1036685/29069820069.pdfIn PDF document text
    • https://site-1036646.mozfiles.com/files/1036646/rijujeroxatibumepu.pdfIn PDF document text
    • https://site-1036691.mozfiles.com/files/1036691/pomegimosage.pdfIn PDF document text
    • https://site-1037260.mozfiles.com/files/1037260/volijoduwasixevumiredexov.pdfIn PDF document text
    • https://site-1038879.mozfiles.com/files/1038879/10691679250.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_off00006ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE1 5484 bytes
SHA-256: a981e1dbf09f021377ad384f22ec839b644f5ab5342471f8688536bc61707e63
font_01_sfnt_off00007da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA4 10408 bytes
SHA-256: 7ff377b787aaa2966651a183aabfb51e7e7a5ddbe63275fc85e9e7959ef1024a

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