Malicious PDF — malware analysis report

Static analysis result for SHA-256 82e2610b4c8a9baf…

MALICIOUS

PDF

52.9 KB Created: 2020-11-09 04:48:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 4dec1439c70dd63e05957b6cc9535bf5 SHA-1: 9a40ae3ecc246320c0665784caefa35f94f6da4d SHA-256: 82e2610b4c8a9baf63d3b3c0e02c45afe3c1ee3f75cc45498713c324d5128ae7
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=umber+hulk+dnd In PDF document text
    • https://redilabow.weebly.com/uploads/1/3/4/3/134316718/virekujajeru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391649/normal_5fa5dcee49a1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405413/normal_5f9b6f6816b46.pdfIn PDF document text
    • https://degepuwenezeg.weebly.com/uploads/1/3/1/6/131607310/10111.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://suvefegoxi.files.wordpress.com/2020/11/nhac_tre_chon_loc.pdfIn PDF document text
    • https://zojemadej.files.wordpress.com/2020/11/73587489466.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/kilum.pdfIn PDF document text
    • https://zokelemix.files.wordpress.com/2020/11/30358221064.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/the_chaldean_oracles.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/lista_de_excipientes_farmaceuticos.pdfIn PDF document text
    • https://kebupud.files.wordpress.com/2020/11/16674380217.pdfIn PDF document text
    • https://vivader.files.wordpress.com/2020/11/4295402055.pdfIn PDF document text
    • https://vulopadur.files.wordpress.com/2020/11/kabudeveluropol.pdfIn PDF document text
    • https://dusikoxi.files.wordpress.com/2020/11/34845633614.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_off0000901a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x901A 4872 bytes
SHA-256: 3c27d118afa3dc2c09f42cb819cff959c5a48a232a99b71e4065d7745dd84c56
font_01_sfnt_off0000a079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA079 11348 bytes
SHA-256: 6c58ea8df4f694e59d34a0e28407b0fdd028f4e93e9a212bbfff993294528b3b