Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2912e7e39cff59c…

MALICIOUS

PDF

48.4 KB Created: 2020-11-08 07:57:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: d71cbb7d344369ca1b2b7464c9ae94ab SHA-1: 2c929a94e02d740bc4af6f0884ccf455d3f239f5 SHA-256: f2912e7e39cff59cb8021a1c13e193269c9063702bc0d7cd4d32f0b3d20edd72
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://trafffi.ru/aws?keyword=4+wheel+madness+3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373517/normal_5f9ade1486a5d.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/1ecc77e0-cc81-4e40-8a1a-03c98703334f/zosijifurejumej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a01ae58-aa1f-44f4-8da6-5c31d416b093/cute_dragons_pictures.pdfIn PDF document text
    • https://sebexin.files.wordpress.com/2020/11/analisis_factorial_del_banco_de_mexi.pdfIn PDF document text
    • https://direpupiwabe248790905.files.wordpress.com/2020/11/10856063596.pdfIn PDF document text
    • https://witubavepiti.files.wordpress.com/2020/11/pazawiribi.pdfIn PDF document text
    • https://tixafotode.files.wordpress.com/2020/11/zukijefigiroj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90a06f75-8d32-4c75-9367-6e77c887d0b1/maou_no_hajimekata_17.pdfIn PDF document text
    • https://nuvinifiraf.files.wordpress.com/2020/11/navoj.pdfIn PDF document text
    • https://gukoxawe.files.wordpress.com/2020/11/20884693481.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a69b9946-d5e3-4bca-a5ac-be56e9129f16/vobipakadizikoz.pdfIn PDF document text
    • https://vinutolaxuw.files.wordpress.com/2020/11/16403632953.pdfIn PDF document text
    • https://zuwumatola.files.wordpress.com/2020/11/74541157504.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_off00007c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9A 5220 bytes
SHA-256: 8d09e875a56f9ccd82afe3ff5091fb46fb11c58a47fdbcfa8629d0f020d8c501
font_01_sfnt_off00008e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4C 11356 bytes
SHA-256: e931e61f4013a07fb197725b1ff88dfa7eee2d4b62e2437ba1ac25e77ff9318e