Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4bb59e30ef9cea1…

MALICIOUS

PDF

41.5 KB Created: 2020-10-09 08:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d3932078482234cb1a6c9d58a6a1c83e SHA-1: 7d06d842b67e5c39b6cff51b26d8f1d0d9c613b4 SHA-256: c4bb59e30ef9cea1e64ab28713a8c109ee6167813fe1a6ed40f08c4b38527674
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://ttraff.link/pify?keyword=baixaki+jogos+online In PDF document text
    • http://files.harbor-club.org/uploads/1/3/0/8/130874212/8474874.pdfIn PDF document text
    • http://files.sophisticatedfit.com/uploads/1/3/0/7/130776267/92fbfe1.pdfIn PDF document text
    • http://files.mnmsprinkler.com/uploads/1/3/1/3/131380058/4793259.pdfIn PDF document text
    • http://files.dandjgypcrete.com/uploads/1/3/1/1/131164456/1927434.pdfIn PDF document text
    • http://fuzudiz.pillagerboosterclub.com/uploads/1/3/0/8/130873830/dusobemat.pdfIn PDF document text
    • http://visopilov.ayrshirejudoclub.co.uk/uploads/1/3/0/8/130814328/tabonadod.pdfIn PDF document text
    • http://foxozatod.lancerpep.org/uploads/1/3/0/7/130739101/suxipulere.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5025/3984/files/ovilus_3_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c48c15-e149-424b-a63b-c443ceca1ffc/negerabikipavife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/130e6988-baeb-47b3-a464-112ffedc7280/33187641304.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_off000065da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DA 5012 bytes
SHA-256: 53667b101a4b34fbb29a766ffa02921ae8d46c3b876919e78ee847d2fdf903d2
font_01_sfnt_off0000770e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770E 10316 bytes
SHA-256: e5ea69d6d68ee85f006cc906fe1b9ac5ddc66a9b6b2bb1d7eb7f6160fa15bd89