Malicious PDF — malware analysis report

Static analysis result for SHA-256 a535ee9dadf5001b…

MALICIOUS

PDF

45.8 KB Created: 2020-11-06 19:32:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 008fda3b7b4e7b29cb2c8b7c5844635e SHA-1: d7f817c3d5863c61a3115feae744f8913d94fcaf SHA-256: a535ee9dadf5001b7f3d4c961c3d44034efae86dbbf45a2884218c68a01eda22
66 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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=rochester+ny+white+pages+frontier PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369660/normal_5f97dd415c7b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5f89ca0821fd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446027/normal_5fa00af9abaee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pisik/facebook_lite_app_download_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/root_marshmallow_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/702927d2-7a23-417e-9922-c8e9f38fa54d/19105991253.pdfIn PDF document text
    • https://zimevopuwew.files.wordpress.com/2020/11/94018087081.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/list_of_anti_inflammatory_foods.pdfIn PDF document text
    • https://rujakozin.files.wordpress.com/2020/11/sao_integral_factor_item_guide.pdfIn PDF document text
    • https://sebuwisawos.files.wordpress.com/2020/11/fipupojuretis.pdfIn PDF document text
    • https://poxebel.files.wordpress.com/2020/11/sutipabupo.pdfIn PDF document text
    • https://jogivudewel.files.wordpress.com/2020/11/2129586400.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/owl_life_cycle_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7c2d07-ae0d-427d-b99e-f733724e9b2f/vizarezidoxibezuvebewufaw.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/cantilever_staircase_details.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_off00007206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7206 5448 bytes
SHA-256: cd50552e6a4feac58256fb5c988e6e85266676d1d1ddcc6a3fd66fe15bf15e28
font_01_sfnt_off000084b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B0 11124 bytes
SHA-256: ac1916e1bd4252d288556c03745972e0f860712cf6885115f9058e34cb08d39a