Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb09dcb81753014…

MALICIOUS

PDF

44.3 KB Created: 2020-11-07 20:14:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 942b4f48d30767c6c7cf1a606cf2a781 SHA-1: 54889beab0eec8187491af72aa4caa64ff330e37 SHA-256: fdb09dcb8175301478c6acc7f6881787479c48e6f575d0aa6362293ca5bdd2f7
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://traffmen.ru/123?keyword=bushido+and+chivalry In PDF document text
    • https://velabusodogir.weebly.com/uploads/1/3/1/8/131858366/8659dd.pdfIn PDF document text
    • https://pojetepanale.weebly.com/uploads/1/3/4/3/134361345/renuterukatat_wunariwiro_jerilurexi.pdfIn PDF document text
    • https://xofuvavafifibib.weebly.com/uploads/1/3/4/3/134386759/7944453.pdfIn PDF document text
    • https://devomejot.weebly.com/uploads/1/3/4/4/134491467/5cb8b3b9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vafinudon.files.wordpress.com/2020/11/68151212694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a1e2934-3a6f-4565-90b3-3d63a7ad958a/62406851309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e918763-e99d-4933-b8a6-4827d875ffb9/psu_academic_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ab2aa8b-4e66-442e-9c12-5e0648ccd4f9/65763280761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc4e53ec-f3f9-4db7-b92a-1c315e26df26/47190149499.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/vuvemi.pdfIn PDF document text
    • https://lamokiwinube.files.wordpress.com/2020/11/waselo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe2c3c2d-5c2c-4012-9508-8bd693bf321c/96715463165.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_off00006ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE0 5236 bytes
SHA-256: a3b89ef2e3282ca932d0a38ea2ab85ab4d4092509ee1321eeb9476ae2c9e2865
font_01_sfnt_off000080b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B5 10488 bytes
SHA-256: 8360e1df2b3150f62ef5f30e151c69343f2d1eaff0b95a8fc04b9efbf32b1b40