Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ebf8f1ef299b5c…

MALICIOUS

PDF

43.8 KB Created: 2020-10-05 05:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 33fddec171f765ea009fcb43fe4f31f5 SHA-1: 51814dedff9a5c5a4501139f44cb6bba4b8eab06 SHA-256: f7ebf8f1ef299b5c4745f6ea2d954d7160818ea92f977d8c10a8e61abc4b34c1
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://ggtraff.ru/strik?keyword=how+to+make+a+flamethrower+pdf In PDF document text
    • https://site-1039665.mozfiles.com/files/1039665/sunitotudapamitimar.pdfIn PDF document text
    • https://site-1038973.mozfiles.com/files/1038973/tiwutasixogose.pdfIn PDF document text
    • https://site-1044064.mozfiles.com/files/1044064/31563862162.pdfIn PDF document text
    • https://site-1039646.mozfiles.com/files/1039646/6041980822.pdfIn PDF document text
    • https://site-1037238.mozfiles.com/files/1037238/ketub.pdfIn PDF document text
    • http://files.raquelmeraki.com/uploads/1/3/2/7/132740860/3354846.pdfIn PDF document text
    • http://files.destyinvestments.com/uploads/1/3/0/8/130813988/2592321.pdfIn PDF document text
    • https://site-1040325.mozfiles.com/files/1040325/15109042210.pdfIn PDF document text
    • https://site-1037848.mozfiles.com/files/1037848/76015403402.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/b8b7c1b3-1009-4a97-8560-af9ffb694c36/natuvin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26c129e0-13fa-4937-bbc6-04eeee14d26c/zidodefugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22748ec8-3542-469e-9565-eeab8a075ebf/47409987218.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_off00006818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6818 5220 bytes
SHA-256: 12f405233919329e47816a16ca19b83f5b03986fe7a2c6983ed740a3d11b033e
font_01_sfnt_off000079bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79BC 12772 bytes
SHA-256: a52cfee32aa230f83f0d4d6ef38a07f90d1d6a649223b2c14235e879ac91a739