Malicious PDF — malware analysis report

Static analysis result for SHA-256 1686212c87c24f46…

MALICIOUS

PDF

44.5 KB Created: 2020-11-06 02:44:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 35c23fe047a49ad0d1391f15128d1f03 SHA-1: 1e822a68572ce0e3c26b77c9493365b477c4ed70 SHA-256: 1686212c87c24f46c3c6ff5eaa402dd051967af79997199e9a374d7919ef4e0a
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/aws?keyword=extra+large+carvable+craft+pumpkins In PDF document text
    • https://manapefowuv.weebly.com/uploads/1/3/4/6/134605974/40f4f27dea.pdfIn PDF document text
    • https://suvibumaluri.weebly.com/uploads/1/3/4/4/134458401/zinufela-wotone.pdfIn PDF document text
    • https://depufavekozumel.weebly.com/uploads/1/3/4/0/134017714/2688427.pdfIn PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/21736d4514.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f88154118b20.pdfIn PDF document text
    • https://tixovokibena.weebly.com/uploads/1/3/4/1/134109053/b888f77794cd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dobesogum/dd_magnificent_mansion_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/3140/4959/files/power_of_positive_thinking_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/81619590398.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/tutorial_aegisub_espaol.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_off00006d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D82 5624 bytes
SHA-256: 271a4ab0af9b0ddbcf5f1a1cf4b6055a398c2c34d47052643d80e4d07c435503
font_01_sfnt_off000080a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A1 10936 bytes
SHA-256: 2a5efb14f30e68f59b4100f707b24121133037e5de17155d82bc3ac010c16a66