Malicious PDF — malware analysis report

Static analysis result for SHA-256 c73519bf05fa88e3…

MALICIOUS

PDF

67.6 KB Created: 2020-10-03 20:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 85ee59b7a711e1d87831de9a1e000e5a SHA-1: 27b7449579e3f6cfad1477df7899abc9b2d23f21 SHA-256: c73519bf05fa88e30302cce9444412f2ee3f08d74b8fc9e4c741fede30413d12
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=steins+gate+ending+song In PDF document text
    • https://site-1037858.mozfiles.com/files/1037858/77083560009.pdfIn PDF document text
    • https://site-1038494.mozfiles.com/files/1038494/17854113884.pdfIn PDF document text
    • https://site-1039481.mozfiles.com/files/1039481/38561889175.pdfIn PDF document text
    • http://rolep.anuncommonplace.com/uploads/1/3/0/7/130775164/nuzobef.pdfIn PDF document text
    • http://wevino.animachristiretreats.org/uploads/1/3/0/7/130776008/4424f.pdfIn PDF document text
    • http://files.5ivezero.com/uploads/1/3/1/4/131437538/boxuzuzege-jamov-susaxozokusonir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5beae113-0392-4822-9498-7e53fe8f9d8b/3497971636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c39dcb8-12d0-4542-9e39-adac8a1777cd/mafutami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/398be05d-958d-4f90-8ee9-e4cee4c81a33/vufukulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e861fd22-f0ca-4f2c-82fd-0c00a52491be/98898662818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77f22fa8-cf9e-4a19-8ff6-43bf8dc22598/lepafunozufuxugemivevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9778/3458/files/powerful_prayers_for_souls_in_purgatory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/0232/3094/files/hoe_nalu_sup_costco.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4660/1372/files/gegujefowijanedamiwerag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7492/9319/files/docking_bay_94_lego.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
    • 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_off00009e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E04 5144 bytes
SHA-256: d8dacc36544d04509255ccfe114b00f54f26221321f367ee92b1568a1d2639f9
font_01_sfnt_off0000b020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB020 4968 bytes
SHA-256: 41ff2128c22ecfed3ef235ce209a98e729773fe75cbe475566cd61354727af99
font_02_sfnt_off0000c118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC118 11988 bytes
SHA-256: 8c3258a33c3bfe52663132fddcd940671d4b57319ce6ecd32461fa4eea77eed3
font_03_sfnt_off0000e884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE884 17008 bytes
SHA-256: 48408b45b7beb9ccae449691b6c24427912fc9ee3461b9732ecb3299ba3939e8

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