Malicious PDF — malware analysis report

Static analysis result for SHA-256 3433bb4e4d7829ee…

MALICIOUS

PDF

39.8 KB Created: 2020-11-09 10:34:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 754d6e49ed731ee129365c6f04c74d18 SHA-1: 641d0dfa5f595239b70c4df4736afd36bb0fc98b SHA-256: 3433bb4e4d7829ee17d468a280890e37446e9896572042a97afc08e29353e049
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffking.ru/123?keyword=wen+2020+conference In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416939/normal_5f9878bc931dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403820/normal_5f931557db64f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380699/normal_5fa48ed925a18.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tirutijupez.files.wordpress.com/2020/11/fepag.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/lugotorizereziwatogukomak.pdfIn PDF document text
    • https://walojom.files.wordpress.com/2020/11/debug_android_studio_variable.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/lista_dei_phrasal_verbs.pdfIn PDF document text
    • https://xijadijuf.files.wordpress.com/2020/11/verilux_happy_light_2500.pdfIn PDF document text
    • https://gadelonu.files.wordpress.com/2020/11/solaxidelowusexuk.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/generative_adversarial_networks_projects.pdfIn PDF document text
    • https://fororonur.files.wordpress.com/2020/11/76324034682.pdfIn PDF document text
    • https://gozevawu.files.wordpress.com/2020/11/3954572284.pdfIn PDF document text
    • https://gezafetino.files.wordpress.com/2020/11/descargar_touchretouch_apk_full.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_off00005e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4D 4740 bytes
SHA-256: 19d4ab958343820cdb93a128d49bd0f0d8b33c701a15c2fb9987ad791fe493b1
font_01_sfnt_off00006e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9A 10652 bytes
SHA-256: 6fa67da92d57844137b7eb2657d00b45dc0571bb8aacd49aac8106500e31aa47