Malicious PDF — malware analysis report

Static analysis result for SHA-256 5262709a6eb4d340…

MALICIOUS

PDF

38.6 KB Created: 2020-10-03 07:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 86b0f63389de718ecb3293e4d585fcae SHA-1: 94edb18b5c24fe770769e3b13954a3f7bcbe0b7d SHA-256: 5262709a6eb4d3404c2d7ee4cf6100bf0df9fd2f2a37e717ce3858145756526b
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ggtraff.ru/strik?keyword=introduction+to+politics+garner+ferdinand+lawson+pdf In PDF document text
    • http://files.amoredifiori.com/uploads/1/3/0/8/130814017/aaf69a2184f8944.pdfIn PDF document text
    • http://files.dadonkeyonline.com/uploads/1/3/1/0/131069899/tiputobaji_sipisitudoguk_fewubatik_defokuziw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6328/7448/files/wulavefurep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1989/7501/files/a_study_of_numbers_schwaller_de_lubicz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2088/9506/files/xuxet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3881/0010/files/wavafejegodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1707/5868/files/gta_2_fast_2_furious_game_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96916f7d-facb-493e-85fa-f60ce8018bea/90134027004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/205e25ec-dcc7-4fa0-910a-5e2838061814/ralekoxivifiwipenawiruli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1052/2277/files/60340056282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3671/0824/files/writing_a_short_story_graphic_organizer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8515/8807/files/declaracion_de_independencia_de_estados_unidos_4_de_julio_de_1776.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_off0000591a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x591A 5352 bytes
SHA-256: 799d0f9094cdf13f7279d130abb7df88a8ea761db17538755de098f0ed50a30e
font_01_sfnt_off00006b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6C 9888 bytes
SHA-256: 2e97ad6b5a14fd6d843f78c2956a2551795498f5790b5c49e38ea26998e60511