Malicious PDF — malware analysis report

Static analysis result for SHA-256 809c0eae9f2fe3be…

MALICIOUS

PDF

57.5 KB Created: 2020-10-16 21:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f645b3315edeecbaa68d6295c6783c5c SHA-1: 40ff07a7bb3637142a50f03172408f2dcc7c2721 SHA-256: 809c0eae9f2fe3beebb9578e03ce304d98b2d04f3cda088e526d4c082e89ac79
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://cctraff.ru/123?keyword=le+basi+della+psicoterapia+psicodinamica+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_5f88894c45a93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5f873c9d4a0d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369671/normal_5f88580b71872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373248/normal_5f894ad1e27ed.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/pazakafevazetawutu.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/fibaxizimudez.pdfIn PDF document text
    • https://xodetawutal.weebly.com/uploads/1/3/0/7/130774968/bb10ca303.pdfIn PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/sebozuxodora_fexitaguw_pemates_jufafigovajavo.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/zevebi.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/sugikubuwova-gogovulerep-mufapifuvel-rurimul.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xizaxamuxive.pdfIn PDF document text
    • https://welofubevi.weebly.com/uploads/1/3/1/8/131856084/tirezisuzafilix_zebifefor_tasiti_guxotevegomulu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/92150348928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5973/6476/files/blank_equipment_sign_out_sheet_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4409/7176/files/evenflo_car_seat_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d027d89-7316-496f-98f6-8408aa1e903c/15177434729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ec2256-3eeb-4075-b6cb-4a886a5d4f57/mijuvuninebukotuxuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7741316d-b98d-4e84-898d-27bcc94c1832/lalovaniwinevoriner.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_off0000a0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0E1 5384 bytes
SHA-256: dc8ec96804108fe5dc01f3d5c6c12df398ac04e73ad593f47b971a68a8d31a7d
font_01_sfnt_off0000b30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB30C 11552 bytes
SHA-256: 1d3fa85aec07e6c5787240b82b2a58718e3c3e454991b7072e9e2feab4adc8cf

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