Malicious PDF — malware analysis report

Static analysis result for SHA-256 32caa6a6eb4aaa39…

MALICIOUS

PDF

46.9 KB Created: 2020-10-04 19:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: add663ab91d4bcb3d12464893786179b SHA-1: e2e12e1843898210953f5da150752f380a7ce9c2 SHA-256: 32caa6a6eb4aaa39d0cb62ffddfa0aae296d8fa66ae406ec5a5a396037801206
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://cctraff.ru/strik?keyword=50+nuances+de+grey In PDF document text
    • http://wujekul.nideyphotography.com/uploads/1/3/2/6/132683328/56c091daf4b.pdfIn PDF document text
    • http://files.chicagolandboxers.com/uploads/1/3/0/7/130775085/desotivotasitepuli.pdfIn PDF document text
    • http://pakevon.antonylab.org/uploads/1/3/1/6/131607022/mowimobaserivi.pdfIn PDF document text
    • http://files.liberum13.com/uploads/1/3/1/1/131163908/menejosexi_guwetizufor.pdfIn PDF document text
    • https://site-1037273.mozfiles.com/files/1037273/wosilunelegetozogo.pdfIn PDF document text
    • https://site-1037026.mozfiles.com/files/1037026/goxuwodevaloroxerokul.pdfIn PDF document text
    • https://site-1036725.mozfiles.com/files/1036725/22100342185.pdfIn PDF document text
    • https://site-1038737.mozfiles.com/files/1038737/xutovosoxojotofemiri.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/1/0482/7755/3314/files/ap_seminar_eoc_part_b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1433/5897/files/bleach_brave_souls_spirit_orbs_hack_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8595/4208/files/tuvuzasozuxijuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/5820/5350/files/mewatolojidesopinekuxuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0385/3476/files/goradafafetukelewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5335/1066/files/42875105673.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_off00007406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7406 5348 bytes
SHA-256: bb0d26bdbe8b68222e61c53a4f807f48a6dab03a67ca7ab2825cf8a974a11fe7
font_01_sfnt_off00008648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8648 12712 bytes
SHA-256: 1972410af68e8790b7657329f66aa84b5b00b65c02d740998ec4c8394867db88