Malicious PDF — malware analysis report

Static analysis result for SHA-256 216d271e4f0a282e…

MALICIOUS

PDF

63.5 KB Created: 2020-10-01 05:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fa0a604a745004377c753f2d4a646bf7 SHA-1: d4df0de7de87a00481e5b8aacca0487967f93c56 SHA-256: 216d271e4f0a282ef3f30215a901ff0d5f9d9b7fd54b2bb3fac71bee4e7dcc5c
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=internet+of+things+journal+pdf In PDF document text
    • https://site-1036750.mozfiles.com/files/1036750/sudunukexotikaraluwa.pdfIn PDF document text
    • https://site-1037241.mozfiles.com/files/1037241/wituwofusavej.pdfIn PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/45243984844.pdfIn PDF document text
    • https://site-1036975.mozfiles.com/files/1036975/kaguwor.pdfIn PDF document text
    • http://files.adrian-spencer.com/uploads/1/3/1/4/131437318/a65ff2a.pdfIn PDF document text
    • http://xukiru.palmercustomwoodworking.com/uploads/1/3/0/7/130739723/dewepoxovo.pdfIn PDF document text
    • https://site-1038756.mozfiles.com/files/1038756/5315766463.pdfIn PDF document text
    • https://site-1039754.mozfiles.com/files/1039754/37156160931.pdfIn PDF document text
    • https://site-1036960.mozfiles.com/files/1036960/77049579802.pdfIn PDF document text
    • https://site-1037240.mozfiles.com/files/1037240/6247742021.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000875a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x875A 5792 bytes
SHA-256: 49821213e4510b6974652892cbc6868a34dee0ef6bb17a50e0db45fd3988a687
font_01_sfnt_off00009b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B67 5316 bytes
SHA-256: adeaee5d298b2f0c9fc11c877ba6f01585e71fdc23ef6610361b420f10f76beb
font_02_sfnt_off0000ad80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD80 14460 bytes
SHA-256: 17600a84b49f43ab97afe3a11b7d31d3cd469c0957704e972fabe71a38ee3dc6
font_03_sfnt_off0000da40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA40 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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