Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb90fe5a64b3da0f…

MALICIOUS

PDF

72.4 KB Created: 2021-02-10 23:53:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3079791c8155a13ccc81d1f7ea5ff850 SHA-1: e2c5443300dd521c9e8b7e31e08582880aff7254 SHA-256: fb90fe5a64b3da0fb6ea8407620cf1d0f95ea98857a6bce9b5ee9f179a0983a3
184 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
  • 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/wb?keyword=alimentos%20transgenicos%20en%20mexico%202017%20pdf In PDF document text
    • https://cdn.sqhk.co/gufemazibafi/cDUgdgf/white_knight_chronicle_wiki.pdfIn PDF document text
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/1323331.pdfIn PDF document text
    • https://zabutamudosuwox.weebly.com/uploads/1/3/5/3/135345211/gasoxizurubapegojom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446273/normal_5fc9429079598.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/sgggcFw/46553966239.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421478/normal_5fe93044dacae.pdfIn PDF document text
    • https://tebudewuve.weebly.com/uploads/1/3/2/6/132683230/jeveful-bukuka-kejoresavumoto.pdfIn PDF document text
    • https://cdn.sqhk.co/xetajikok/jaUL0gd/lujetokigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488569/normal_5fe6601979397.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuvafox.epizy.com/thyristor_basics.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/xagagoxubedugizo.pdfIn PDF document text
    • http://sawopirorafo.rf.gd/managing_anger_worksheet.pdfIn PDF document text
    • http://zomimek.epizy.com/jafamugegelelokefukata.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/clopidogrel_emergency_surgery_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/100_free_photography_logo_templates.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_off0000d8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B1 5936 bytes
SHA-256: 3a240a6a561506e446957056dd264967cd0a15fb7b2efbafb32fc8fb35b07814
font_01_sfnt_off0000ecdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDF 11624 bytes
SHA-256: 7b0b750a8c87713ab5cb217fa7d56e4cdefd2887e9d3997f8892241bf160672a