Malicious PDF — malware analysis report

Static analysis result for SHA-256 8000d98ed45ad7b8…

MALICIOUS

PDF

42.4 KB Created: 2020-10-04 01:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: edb556fe3f7e7c659270fc85fd038c29 SHA-1: 2f50488fe1a641fef9af6308458e2e8cc0751aff SHA-256: 8000d98ed45ad7b88936a89c8449cea7c7d4fa4101d8a6781fa925b7a2d2c9fa
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 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.
  • 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=weight+training+for+soccer+players+pdf In PDF document text
    • http://files.victorxp.com/uploads/1/3/0/9/130969424/1453534.pdfIn PDF document text
    • http://files.cinderscapesorl.com/uploads/1/3/2/7/132741385/pilezaremimu.pdfIn PDF document text
    • http://files.elwoodpspe.com/uploads/1/3/1/4/131437198/pimituz.pdfIn PDF document text
    • https://site-1040006.mozfiles.com/files/1040006/73366360238.pdfIn PDF document text
    • https://site-1041864.mozfiles.com/files/1041864/wagilajakodajanebowovono.pdfIn PDF document text
    • https://site-1041485.mozfiles.com/files/1041485/virarusobolinumodavej.pdfIn PDF document text
    • https://site-1036685.mozfiles.com/files/1036685/kavaxiwitovajutod.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/18939bf1-1d07-4577-994b-ee5d64206ed4/vulamazif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bdffee1-15e9-4199-8b06-2a4e2520cd69/15503831403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e74f8626-ca9b-4d4a-af68-69f6d8c703d4/nanikelitojakag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28f15b18-6f6d-47fa-bd3a-66c678f36f8d/92096394786.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_off000066fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66FB 5532 bytes
SHA-256: 0860ed79015cc0cb95f5b6b8cfb0b585365e0c51d03c57f8e87a78f06514a514
font_01_sfnt_off000079e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79E5 10120 bytes
SHA-256: b52860ad5422ed513cf468aae108c62d22bc57ed4cd09f439cb5ddbfb542f8ea