Malicious PDF — malware analysis report

Static analysis result for SHA-256 8492ae3230cf2764…

MALICIOUS

PDF

41.1 KB Created: 2020-11-07 04:12:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: e4b59b56aa5b6a748e99b8a7de43720c SHA-1: 5d06d5eec5144435e22ade8c24e8a602e81ef195 SHA-256: 8492ae3230cf27649a21c07dbcb6a45550a75a421fdd79050b00687255ad03ab
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/123?keyword=unit+4+linear+functions+answers In PDF document text
    • https://nowakepofor.weebly.com/uploads/1/3/4/3/134369235/gazifop.pdfIn PDF document text
    • https://bevalapiwilidi.weebly.com/uploads/1/3/4/5/134587476/1206806.pdfIn PDF document text
    • https://luzidasagozoro.weebly.com/uploads/1/3/4/3/134319964/2900836.pdfIn PDF document text
    • https://jinoxunetoxufa.weebly.com/uploads/1/3/4/6/134698665/5493963.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://redasiwum.files.wordpress.com/2020/11/poredumevimuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f38e980-97d9-4e8e-a1f4-43cf18fe5f37/medageneko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a70d237-467f-4a2a-8e9f-244f659862b3/18013376323.pdfIn PDF document text
    • https://zidurezinale.files.wordpress.com/2020/11/8204752957.pdfIn PDF document text
    • https://pukatof.files.wordpress.com/2020/11/39837047302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f021bca-cd52-460a-9057-f63a25db9736/23808903130.pdfIn PDF document text
    • https://fojalotidunu.files.wordpress.com/2020/11/27984448911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65022173-ade3-419e-b7c1-01d70fd6221c/xemexosagetiwibelijol.pdfIn PDF document text
    • https://zofitebe.files.wordpress.com/2020/11/jifikubopelilifu.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_off00005e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2F 5048 bytes
SHA-256: a47a2150a59dfacc730e615b6c6e7875a87d44fd8cac5e439f7242c8770ba901
font_01_sfnt_off00006f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F88 12300 bytes
SHA-256: 5488dd184990d3251fdf786513e3e7b61a1b6fe8f116bcb12d13051bfcdbc51f

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