Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a10b679888aef2b…

MALICIOUS

PDF

53.5 KB Created: 2020-11-06 23:47:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: d0f537b96d73fe0966b754fb109b9eea SHA-1: 3901784f91ef482a7b2ac1a02bf683556230516d SHA-256: 4a10b679888aef2bf4e74c0748c18e13754a8e2671d71b80b447ff709d187249
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://traffset.ru/aws?keyword=teaming+with+microbes+notes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375716/normal_5f8eea7f473a0.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/nuribepopovexu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zudotel.files.wordpress.com/2020/11/dugodimit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b7b5b29-2f65-440a-ab08-56b53ed15cc6/756111241.pdfIn PDF document text
    • https://xanafegeze.files.wordpress.com/2020/11/lukobifov.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/bizexuxi.pdfIn PDF document text
    • https://kajebevomota.files.wordpress.com/2020/11/69565217032.pdfIn PDF document text
    • https://rezekine.files.wordpress.com/2020/11/tatojesanawav.pdfIn PDF document text
    • https://zogidadovo.files.wordpress.com/2020/11/6483423632.pdfIn PDF document text
    • https://riseruzu.files.wordpress.com/2020/11/wavufepatirovopulila.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_off000093b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93B0 5360 bytes
SHA-256: 144f48de97b81442d8f99e577ce6c24d218eaf3e7cb67ff1829702b1d51e72dc
font_01_sfnt_off0000a5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5D4 10460 bytes
SHA-256: 7bfc472faabf786abe4a04c01ba04fcb8daf50771abf65d2686462d7de1c8cff