Malicious PDF — malware analysis report

Static analysis result for SHA-256 371dd4a476431443…

MALICIOUS

PDF

34.8 KB Created: 2020-10-05 22:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b0d85b18162928632aa1bcc689c15f58 SHA-1: 969a9c07a58334a3fa66590a84e14cac2d2961b3 SHA-256: 371dd4a4764314430868d507f09875b9cbc461d995de468a9bf0afeca82e6215
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://gettraff.ru/pify?keyword=i+didn%2527t+said In PDF document text
    • http://files.runningwiththestars.com/uploads/1/3/1/4/131452740/fd7de0f350.pdfIn PDF document text
    • http://zomaf.twistedclovertraining.com/uploads/1/3/0/7/130775172/9616831.pdfIn PDF document text
    • https://site-1038675.mozfiles.com/files/1038675/gexon.pdfIn PDF document text
    • https://site-1037914.mozfiles.com/files/1037914/xevepuxebaxofizujal.pdfIn PDF document text
    • https://site-1037141.mozfiles.com/files/1037141/rekemidebipa.pdfIn PDF document text
    • https://site-1038784.mozfiles.com/files/1038784/86974028123.pdfIn PDF document text
    • https://site-1036925.mozfiles.com/files/1036925/xuzawi.pdfIn PDF document text
    • https://site-1044207.mozfiles.com/files/1044207/pinigijubokizib.pdfIn PDF document text
    • https://site-1037282.mozfiles.com/files/1037282/73315424664.pdfIn PDF document text
    • https://site-1037115.mozfiles.com/files/1037115/97559960573.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/c10bdda7-e540-4e43-980d-4c45dac7039f/gijidutesazotovikozurar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/465a5cca-69b5-410c-9ede-18c0f9141a2d/21251080384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bc3fdf0-eff4-4000-8519-038c7b826073/lonaxajaxoluf.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_off00004dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD5 4664 bytes
SHA-256: c60b29f56df6100b6577cdd79006fc33db094d00a8b1e1d0e80eab5f6fb02898
font_01_sfnt_off00005dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC4 9676 bytes
SHA-256: f369083429879ab3c96c9bfd97909f77576f3d5269aca0438a811a7ec6eed585