Malicious PDF — malware analysis report

Static analysis result for SHA-256 de95aa718ca0f01c…

MALICIOUS

PDF

44.3 KB Created: 2020-10-03 23:17:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: c786bf21dca243775bf7d984716135c5 SHA-1: 1f09243607d4870d5fd5bc2fb555601a9db56d95 SHA-256: de95aa718ca0f01cf84daa04bbc2909c4f304ff63d134538d1edc0d37651ac38
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=f2p+dungeoneering+guide+rs3 In PDF document text
    • http://files.ionaabbeyandclandonald.com/uploads/1/3/2/6/132682119/4808946.pdfIn PDF document text
    • http://files.essense.com/uploads/1/3/2/3/132303082/6841725.pdfIn PDF document text
    • http://files.usjapanfam.com/uploads/1/3/0/8/130813846/4067257.pdfIn PDF document text
    • http://files.equusmedendi.com/uploads/1/3/0/7/130739719/2747708.pdfIn PDF document text
    • http://genoti.wickedladiesbeeco.com/uploads/1/3/2/7/132710494/pizokoxowuwugogefeki.pdfIn PDF document text
    • http://files.otccomedytroupe.com/uploads/1/3/1/8/131871690/pupip.pdfIn PDF document text
    • https://site-1039666.mozfiles.com/files/1039666/dugefizikinumibo.pdfIn PDF document text
    • https://site-1037233.mozfiles.com/files/1037233/71806900700.pdfIn PDF document text
    • https://site-1037828.mozfiles.com/files/1037828/75999915606.pdfIn PDF document text
    • https://site-1037132.mozfiles.com/files/1037132/86772997723.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/635b80e1-d50d-44b8-b38d-66d3c7509b5a/15717551460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e8d66af-feaf-45c6-8a72-5c7dc7ebf0a1/13955424191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a595e8-cf37-4b98-b5fb-75a3f91f126e/lunebomamuwero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0d58038-ab92-47c8-a51c-3c3f3345ff17/xasuxox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc55f86-6e30-4b66-9318-ba002e792aa1/49954289552.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_off00006f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8A 5136 bytes
SHA-256: 57c44b84bb4d38c634dbfcab613d546a0f8394b1d155b3eb3dd5f5e0a83facf5
font_01_sfnt_off00008124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8124 10248 bytes
SHA-256: 070b0ca3a89be8c47d776456f6f88025389dc28e387a9cd81154aab5b0b27524