Malicious PDF — malware analysis report

Static analysis result for SHA-256 250140a450ecf775…

MALICIOUS

PDF

46.0 KB Created: 2020-10-02 03:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9b20b0a0bf2a9fcaba9c65dc2c78705c SHA-1: 28461f9f3bc04f7597a3a7d283643853ec57cd98 SHA-256: 250140a450ecf77566e6ee31599495a6dd536d6bda02f700c4f7ff1342f09b95
172 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=nas+stillmatic+download+zip In PDF document text
    • https://site-1037843.mozfiles.com/files/1037843/79621432432.pdfIn PDF document text
    • https://site-1036724.mozfiles.com/files/1036724/45422551095.pdfIn PDF document text
    • https://site-1038460.mozfiles.com/files/1038460/xudokeropexorokukisuva.pdfIn PDF document text
    • https://site-1039669.mozfiles.com/files/1039669/98414795950.pdfIn PDF document text
    • http://galetu.prostudiomtl.com/uploads/1/3/1/4/131453119/mejunar.pdfIn PDF document text
    • http://files.paysprovencal.com/uploads/1/3/0/7/130740231/rivajefevezi.pdfIn PDF document text
    • https://site-1038503.mozfiles.com/files/1038503/83671773101.pdfIn PDF document text
    • https://site-1038326.mozfiles.com/files/1038326/gukuxe.pdfIn PDF document text
    • https://site-1036665.mozfiles.com/files/1036665/juxojolozokunuz.pdfIn PDF document text
    • https://site-1036883.mozfiles.com/files/1036883/83387110622.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3695/9139/files/woxil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4D 4904 bytes
SHA-256: 785d0e26d0563c2aaa4c741bf5eb20b0d12268021703350307c3573a30c23c67
font_01_sfnt_off00007af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF5 10052 bytes
SHA-256: dcd446575549446975e37d64df50c4c85fb721c9e553a71d98bf5df00bf6962b
font_02_sfnt_off00009d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D3D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3