Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c1017553cb27616…

MALICIOUS

PDF

50.9 KB Created: 2020-11-08 02:48:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 7464f82d17195c192d29666574467d91 SHA-1: aa24549881e2f0b9b6ff5caf39409e5e77b04798 SHA-256: 5c1017553cb27616d75b1478e34546227baf580e9552fc9bff8a311b58a42873
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://traffmen.ru/123?keyword=witchery+how+to+charge+attuned+stone In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393755/normal_5f8f42d435816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414167/normal_5f9c2e8b53421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424009/normal_5f97b8f9c43da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_5f8be8844f035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369328/normal_5f945e0bec810.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tumasun/utada_hikaru_first_love_sheet_music.pdfIn PDF document text
    • https://gatubatixaj.files.wordpress.com/2020/11/ati_radeon_x600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22e5e0eb-af53-429d-8a83-7d368da5d7bf/piges.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22d9afff-1cc1-40ac-abf7-054c4f2203cc/jk_s_skyrim_and_open_cities.pdfIn PDF document text
    • https://sapifotad.files.wordpress.com/2020/11/luwapekixajitesenimedi.pdfIn PDF document text
    • https://saxofenofam.files.wordpress.com/2020/11/73320521206.pdfIn PDF document text
    • https://zukodofi.files.wordpress.com/2020/11/dragon_prince_wallpaper.pdfIn PDF document text
    • https://verozunevol.files.wordpress.com/2020/11/56961110524.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/74090705474.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_off00006041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6041 3312 bytes
SHA-256: 082c89522e4251f0a814862fddf633b1dac669eb780a02580130c1f52bfffe84
font_01_sfnt_off00006c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C22 5376 bytes
SHA-256: b12d8d09a32473f92830ce82374ea7ec4acd970cee78837c78b839b8ebea466f
font_02_sfnt_off00007e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E84 12596 bytes
SHA-256: 1655b443b9c8b8a639cc5e3eaba8209e0cb90c00d27441235986ff82addf98ce
font_03_sfnt_off0000a724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA724 16136 bytes
SHA-256: 62b0478e3bcacaeb9df6fa0984507e722920f7489b4d5e25f45df3fdf1e55086

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