Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef76d229e9f192c…

MALICIOUS

PDF

48.8 KB Created: 2020-10-05 21:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e8353a6955669af0d4144e8c4f54ae52 SHA-1: 62de9640427ef5097d16c459f31c8e47e37b6ac1 SHA-256: 6ef76d229e9f192c05a736109136010b1e5317adebdddc28e8023160f4066f9d
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/pify?keyword=jumper+cable+clamps+autozone In PDF document text
    • https://site-1039577.mozfiles.com/files/1039577/41500645478.pdfIn PDF document text
    • https://site-1039419.mozfiles.com/files/1039419/65001361327.pdfIn PDF document text
    • https://site-1039349.mozfiles.com/files/1039349/84053593377.pdfIn PDF document text
    • https://site-1043374.mozfiles.com/files/1043374/88129933513.pdfIn PDF document text
    • http://kisifaso.eaglespiritacademy.com/uploads/1/3/1/4/131408061/tifiwidepe.pdfIn PDF document text
    • http://xofefisag.firesportuk.com/uploads/1/3/1/4/131407629/41ef2a80f.pdfIn PDF document text
    • http://files.challengerstrength.com/uploads/1/3/0/7/130739756/b465501c9fa.pdfIn PDF document text
    • http://files.lowbros.us/uploads/1/3/1/4/131408942/puzoposi.pdfIn PDF document text
    • http://files.deansoiltrek.com/uploads/1/3/1/3/131398281/1452685.pdfIn PDF document text
    • http://files.zioncommunityfarm.org/uploads/1/3/1/3/131398573/lijasavur.pdfIn PDF document text
    • http://files.chinovalleylioness.com/uploads/1/3/1/4/131453684/ritazek-zijuvanagijedev-luduvametot-nazabu.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/1123615c-e7df-4f07-a56d-ef32d7243095/4930615674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6974dfae-2e88-4f88-b4a8-422c0b9e2bd0/59630821104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/627273cc-bc1e-4167-86b5-84dcb173e04d/xoguborolovutafixitajug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b736b84-a57c-4119-a2d5-57ee18e7af0c/wilerebimaxedepopojan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e49a95ef-a4cc-4392-91aa-69b2f4ff21ae/bibomisivuxitutetelemute.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_off00008093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8093 5256 bytes
SHA-256: 5fc0cfbda699e7379f0fa90e810f8937c5ca1a28b550c4e14993e1c17ab03f9c
font_01_sfnt_off0000925a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x925A 10444 bytes
SHA-256: 7d233c908a0e6626b35e26739b86ccb358129ad44bbcffd1568b25b2d908bd65

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