Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d65e38083249c3e…

MALICIOUS

PDF

69.8 KB Created: 2020-10-01 02:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7a6f4bfb89ae7df2fede86bff13a44f1 SHA-1: ede87329e937105c646c32689f02b106dd5def87 SHA-256: 3d65e38083249c3eada8fadc3bdd33176d4f4e0935a2ff858a77d5bb44e9d74d
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://cctraff.ru/strik?keyword=nios+biology+book+class+12+pdf In PDF document text
    • http://kopolikef.nextpathproperties.com/uploads/1/3/0/7/130739024/5893526.pdfIn PDF document text
    • http://files.troop75.org/uploads/1/3/2/3/132303320/pelenolirapar-zupopok-zezobevol-xokivugovuk.pdfIn PDF document text
    • http://files.caitlingriffithsarchive.com/uploads/1/3/1/3/131382700/nabivam-gapufofazido.pdfIn PDF document text
    • http://files.gilliancarmoodie.com/uploads/1/3/0/7/130776299/fufuxogipu.pdfIn PDF document text
    • https://site-1036824.mozfiles.com/files/1036824/83527590337.pdfIn PDF document text
    • https://site-1036985.mozfiles.com/files/1036985/80622339560.pdfIn PDF document text
    • https://site-1036960.mozfiles.com/files/1036960/34209424175.pdfIn PDF document text
    • https://site-1036958.mozfiles.com/files/1036958/20983892896.pdfIn PDF document text
    • https://site-1037884.mozfiles.com/files/1037884/6563725447.pdfIn PDF document text
    • https://site-1037849.mozfiles.com/files/1037849/21907882788.pdfIn PDF document text
    • https://site-1036659.mozfiles.com/files/1036659/sanebaxezajavozete.pdfIn PDF document text
    • https://site-1038919.mozfiles.com/files/1038919/wefodoronejev.pdfIn PDF document text
    • https://site-1036816.mozfiles.com/files/1036816/25443381610.pdfIn PDF document text
    • https://site-1036627.mozfiles.com/files/1036627/pesokemufalovitosinat.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://uploads.strikinglycdn.com/files/17e52871-8bf0-41d2-88fc-42ab68b4b126/vavepaxema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d614f87-cd9c-449b-b9d6-c078ee09d77f/fomen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05290d3e-f597-4e81-a24f-d45f88a708da/86601993282.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_off0000c7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DD 5172 bytes
SHA-256: 61d91a587a06a7afd86f6a475e7582909b01cdc271b0c3d2acdf2df040c522ee
font_01_sfnt_off0000d984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD984 10116 bytes
SHA-256: 943b20843ab53daa506ef4929143a09729a03a28ba7f8339a8a30a8f4c208cdf
font_02_sfnt_off0000fbc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC8 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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