Malicious PDF — malware analysis report

Static analysis result for SHA-256 813c8b3dc5e3bdcd…

MALICIOUS

PDF

43.3 KB Created: 2020-11-01 18:53:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 83d291dbaad9c67565735a036e4d4090 SHA-1: d8ea4ecf2dc6e915ff55cc508f22b59dd7930925 SHA-256: 813c8b3dc5e3bdcd107b01565857426391048c33c622b5892a72e946dd0a7713
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=bethany+moore+md In PDF document text
    • https://fozafilamo.weebly.com/uploads/1/3/4/3/134314768/kivogugadonivuz-jonufoj-juzevawejutiko.pdfIn PDF document text
    • https://lerizizevu.weebly.com/uploads/1/3/4/3/134314130/6492005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446633/normal_5f9e33e1dd0d1.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/sugaguxagu/sivituxukaxatov.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/rc_crawler_chassis_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a96235ea-191e-45d0-82e6-c5679d80d2f6/40979263050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/380465a1-09aa-4a24-92ee-5c56512fe81b/wanawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/622826bf-dbbc-44ed-8cd9-55b26f28cd1a/buwisawaresosegegibeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f06af01-f9e4-427a-849e-f0d7c17107e2/butternut_candy_bar_recipe.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/gumadagidevosuvenex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34264f6b-15dc-454a-8d9e-e239e566c868/miniterminos_y_maxiterminos.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_off00006c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1D 5008 bytes
SHA-256: b4e64bfaca2aacc90784af381f4f68a5a02ac72a797496302532591365a921d5
font_01_sfnt_off00007cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFF 10364 bytes
SHA-256: f15e74ca6063240fe21dd4d6875ebae161fe52030f819550d0f926d30b958811