Malicious PDF — malware analysis report

Static analysis result for SHA-256 caec20ab3b1f4fa5…

MALICIOUS

PDF

39.6 KB Created: 2020-11-06 17:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 2826404db3f808f94e0bfa8428c435d8 SHA-1: 8232c1bfd2c1bd6b6256df54dedbe2338c40eec1 SHA-256: caec20ab3b1f4fa5d1e5ffbafb6d0f71df5f56be661acd33213cbd664b06e720
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/aws?keyword=google+drive+premium+link+generator PDF link annotation
    • https://wejakoguxi.weebly.com/uploads/1/3/4/3/134324676/xogokefarifaju.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/194593.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/944560.pdfIn PDF document text
    • https://jusopusoguwukul.weebly.com/uploads/1/3/4/4/134494455/divikuxiri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418381/normal_5f9ac7f59f7f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420441/normal_5f98dd385b847.pdfIn PDF document text
    • https://jomimufigaz.weebly.com/uploads/1/3/4/3/134319247/nuguwowuwavo-jipemesamedur-jazibexef.pdfIn PDF document text
    • https://xokafewapi.weebly.com/uploads/1/3/4/4/134488510/9547025.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://rujimalik.files.wordpress.com/2020/11/67234744132.pdfIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/sagob.pdfIn PDF document text
    • https://fizafadolozu.files.wordpress.com/2020/11/31713389540.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_off00005d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D89 5256 bytes
SHA-256: 77f263b8dec84523ce691761d9bc0d54cde16972d1dc8a022d554612ffb6bf80
font_01_sfnt_off00006f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5F 10060 bytes
SHA-256: 3dc760bbb8da182cfd9e9c6126162a029c0c2673230352cd2eb4b39999151dc3