Malicious PDF — malware analysis report

Static analysis result for SHA-256 712c5d9742fec115…

MALICIOUS

PDF

58.0 KB Created: 2020-10-03 22:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0213b63f924802aea99ea5d21a363e8c SHA-1: e4d84a4b1606c9e34a2c1848ced6e3db2739336f SHA-256: 712c5d9742fec1157f6690e59748392bc1b2e88d43f7183cedb5e1f07b2bc791
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://cctraff.ru/strik?keyword=nizam+al+mulk+book+of+government+pdf In PDF document text
    • https://site-1037164.mozfiles.com/files/1037164/zeserip.pdfIn PDF document text
    • https://site-1037882.mozfiles.com/files/1037882/13166465299.pdfIn PDF document text
    • https://site-1036852.mozfiles.com/files/1036852/vojolokunego.pdfIn PDF document text
    • https://site-1036923.mozfiles.com/files/1036923/31752945649.pdfIn PDF document text
    • http://gezose.thebutterflyroom.org/uploads/1/3/1/4/131453574/jetar-giduwogibez-lajobevawutipo-koregigu.pdfIn PDF document text
    • http://files.youngthinkersofamerica.com/uploads/1/3/0/8/130814340/komafuma.pdfIn PDF document text
    • http://files.deesdailydish.com/uploads/1/3/1/4/131437669/fikodizoligapu-luwolep.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/6f4a7229-b141-4dc4-8e68-9902030bfc5c/dorikufajubefudafodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01c590cf-a5b3-47f9-8ff2-7dcbbd564326/24888218617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eeeebb5-3eb4-48f6-82c9-4b4b4897a2c1/39623095866.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8424 5468 bytes
SHA-256: d799f84dce1af6858eef2de374d5d5ddc838a395124326afdadf0977131e65dc
font_01_sfnt_off000096bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96BC 10384 bytes
SHA-256: cb3733c4310087d6c022c26a40f4bf88340f5f4f11db2e59e7a5053cb8269b76
font_02_sfnt_off0000b9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9C4 20028 bytes
SHA-256: ab6d67c61e679f890a68773a68f49ecdd50f880647edcb0a8891a718d1620ac5