Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb2bcd40ee5c8fe…

MALICIOUS

PDF

39.9 KB Created: 2020-10-03 13:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 56f186e18b79c78eb88cefdc9fe26f85 SHA-1: 7f22e1bfb7dc55d355e6ffa7fa9ae00e2cd3782c SHA-256: 1cb2bcd40ee5c8fe5e23a86cbf1c06473d168e2276f6964bdae020fff4bcacc6
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://gettraff.ru/strik?keyword=introduction+to+biotechnology+and+genetic+engineering+pdf In PDF document text
    • http://nudivula.victorvalleyphlebotomy.com/uploads/1/3/0/8/130873930/3134391.pdfIn PDF document text
    • http://files.vermontiaai.org/uploads/1/3/2/6/132682630/4069282.pdfIn PDF document text
    • http://files.francisfamilyblog.com/uploads/1/3/0/7/130776370/9688007.pdfIn PDF document text
    • http://dasimafu.bootleggersevents.co.uk/uploads/1/3/1/4/131437601/xubep.pdfIn PDF document text
    • https://site-1040179.mozfiles.com/files/1040179/ruwij.pdfIn PDF document text
    • https://site-1038856.mozfiles.com/files/1038856/vatunofobubetosu.pdfIn PDF document text
    • http://bapural.crowleyroofers.com/uploads/1/3/0/8/130814328/7380142.pdfIn PDF document text
    • http://files.sophiewarner.co.uk/uploads/1/3/1/4/131438397/fozaz.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/1/0483/6864/8343/files/do_the_two_step_and_cowboy_boogie_dance.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 5416 bytes
SHA-256: 81bbee6b7b1c16420ecf32951cfc52cd04c11f05d81e6411ac91e486562f4cb0
font_01_sfnt_off000070b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70B5 9900 bytes
SHA-256: a64bec443902af96a066b392adbf9f76192960dd970bce35451800d2c2b872e1