Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5513b9ff7dc3b02…

MALICIOUS

PDF

40.8 KB Created: 2020-10-08 07:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 526d0fb3afc666f5f6b1687bd05ad67b SHA-1: a886690a85fe815974d6e91b423ecacaf2956bdb SHA-256: a5513b9ff7dc3b0230ff18821749d7be3a4dcaa2f92e006f327153635cdd4c0d
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=hamlet+shakespeare+litcharts In PDF document text
    • https://site-1037114.mozfiles.com/files/1037114/vodixu.pdfIn PDF document text
    • https://site-1043203.mozfiles.com/files/1043203/13904678036.pdfIn PDF document text
    • https://site-1036691.mozfiles.com/files/1036691/wibeguda.pdfIn PDF document text
    • https://site-1044185.mozfiles.com/files/1044185/93972448797.pdfIn PDF document text
    • https://site-1036756.mozfiles.com/files/1036756/69290977289.pdfIn PDF document text
    • https://site-1040256.mozfiles.com/files/1040256/wupujosapagebokifuv.pdfIn PDF document text
    • https://site-1042598.mozfiles.com/files/1042598/61446519476.pdfIn PDF document text
    • https://site-1037909.mozfiles.com/files/1037909/12253775318.pdfIn PDF document text
    • https://site-1037029.mozfiles.com/files/1037029/xaxudupij.pdfIn PDF document text
    • https://site-1036869.mozfiles.com/files/1036869/38350669034.pdfIn PDF document text
    • http://files.krisspanglermft.com/uploads/1/3/0/7/130738951/genifineva.pdfIn PDF document text
    • http://files.salinasvalleyartassociation.com/uploads/1/3/1/4/131409037/9458245.pdfIn PDF document text
    • http://files.barronparkpreschool.com/uploads/1/3/2/6/132682090/96710796.pdfIn PDF document text
    • http://files.musicpoststudio.com/uploads/1/3/1/3/131383921/nidixivoke-vibasudodapi.pdfIn PDF document text
    • http://files.thegoodfeelinglife.com/uploads/1/3/0/7/130738700/nuded.pdfIn PDF document text
    • https://site-1039779.mozfiles.com/files/1039779/lawinoxodok.pdfIn PDF document text
    • https://site-1043403.mozfiles.com/files/1043403/4314788092.pdfIn PDF document text
    • https://site-1037869.mozfiles.com/files/1037869/wejaneji.pdfIn PDF document text
    • https://site-1041857.mozfiles.com/files/1041857/joxivisakimis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00006303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6303 5196 bytes
SHA-256: 306e2fdc705f21c93357515c667188fe37efd654e31b8f56a5e9a35d5d63e882
font_01_sfnt_off0000747e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x747E 9916 bytes
SHA-256: 9d8d33b1a1b28c94ccd3682ebdd7e57562dc7c6f6744947595fd019939aab833

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