Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed698a81d2a719c1…

MALICIOUS

PDF

56.8 KB Created: 2020-10-14 08:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a322eae7484bf81a8d2c94e163af7163 SHA-1: eab24a532f869f1e3987108742d45a0979159731 SHA-256: ed698a81d2a719c1562834ae37fee86efed5d505916f4f601d093e8d59134c25
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=seven+knights+2020+guide In PDF document text
    • https://site-1043752.mozfiles.com/files/1043752/weviboso.pdfIn PDF document text
    • https://site-1039224.mozfiles.com/files/1039224/54491948539.pdfIn PDF document text
    • https://site-1041865.mozfiles.com/files/1041865/43523589461.pdfIn PDF document text
    • https://site-1040164.mozfiles.com/files/1040164/birosaxaropemofunaja.pdfIn PDF document text
    • https://site-1042591.mozfiles.com/files/1042591/6218433596.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/jibepare-vudaramuzi-refirezagulele.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3079835.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/a8401ec7a9859.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/sidobojugonuxexoz.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/72596953-2691-4f62-8dff-b397cf0b1866/27104749941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5958/2878/files/vivat_jesus_knights.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0498/4474/files/51204907487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6027/8949/files/euphemism_worksheet_doc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB8 5252 bytes
SHA-256: f9971095f311eaefa4973358fe201199928450a2c4054f1b65d075dd397c7d1d
font_01_sfnt_off00009da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DA2 10332 bytes
SHA-256: 4a839da025c654f73856c9e44ae9a7471ed3d0332573529bbb4f2517863336d6
font_02_sfnt_off0000c113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC113 16184 bytes
SHA-256: 6f39e3c8e12081e13a47ed6ec25170e46d724a7cb55f714a3c8bcd5e69ae51c4

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