Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac09b7da35004343…

MALICIOUS

PDF

48.8 KB Created: 2020-10-08 22:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9ae8a609fc846a367f221dcb97ed5c29 SHA-1: e8916af316c6396d246169d9452b0315f7d9dff3 SHA-256: ac09b7da3500434347822ebf548b5f687e2c999ab4d9d330b2d8e362b27cb234
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://gettraff.ru/strik?keyword=railway+reasoning+book+pdf+download+in+hindi In PDF document text
    • https://site-1040398.mozfiles.com/files/1040398/27574743331.pdfIn PDF document text
    • https://site-1048190.mozfiles.com/files/1048190/nejuza.pdfIn PDF document text
    • https://site-1038710.mozfiles.com/files/1038710/40368351117.pdfIn PDF document text
    • https://site-1036659.mozfiles.com/files/1036659/rumose.pdfIn PDF document text
    • https://site-1037000.mozfiles.com/files/1037000/nobukepijujitogav.pdfIn PDF document text
    • https://site-1040286.mozfiles.com/files/1040286/vezalewolupoxebiwepa.pdfIn PDF document text
    • https://site-1038679.mozfiles.com/files/1038679/fuxijuw.pdfIn PDF document text
    • http://bapovuv.garrettmichaelmccann.com/uploads/1/3/1/4/131405927/kebametosexi_pezaguja_mokeluxobekorat_mosexititejug.pdfIn PDF document text
    • http://bazeziwa.diamond-lab.org/uploads/1/3/1/8/131857363/6dcc3a2e6a9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/48280417-1686-4b6b-a1d6-57a6cc742023/57898804120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1a8e26f-a102-451c-875a-4447960eda4d/reradafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e81e41e6-4e12-4197-923f-2f3bcda8d9b1/72001035024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c7dce7d-5405-4cdf-81ec-74d39221d18b/kipejesijiwamuxel.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B77 5708 bytes
SHA-256: 28ecb2d0c776e6c8cd5ab981cffdbf2fef166deb46ae0ba36e1780e5c25b9ada
font_01_sfnt_off00006efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFE 15068 bytes
SHA-256: bc57bdd94c6f2fb75a99b890cff84c02e017480e567a682e79cb916394424750
font_02_sfnt_off00009d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D7E 7280 bytes
SHA-256: 6de9c42acf37b7ddc130cde27172d6af98513c87b66c1cb8ec76d4c24447cdd7

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