Malicious PDF — malware analysis report

Static analysis result for SHA-256 35732d99928e498d…

MALICIOUS

PDF

36.5 KB Created: 2020-09-30 16:49:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 36289501b4ba161780ccd45a9bf421ea SHA-1: b46f04745f4789cdc63c02c556fc351bc645ad0f SHA-256: 35732d99928e498d1fc2de1e5302c874d1ad422508dbbea06d37f4bab09622da
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=all+in+one+social+science+class+10+pdf+free+download In PDF document text
    • http://files.eastkentclassicmotorcycleclub.co.uk/uploads/1/3/1/4/131453658/e8960680bd8e2d.pdfIn PDF document text
    • http://files.annaslens.com/uploads/1/3/1/8/131872017/tasuwabur_pawasavaluved.pdfIn PDF document text
    • http://files.hicphotography.com/uploads/1/3/1/3/131380547/3879022.pdfIn PDF document text
    • http://roxifejin.eccrotherham.org/uploads/1/3/1/6/131636777/faterevuwifejoki.pdfIn PDF document text
    • http://xakujefab.mrsperkinsclassroom.com/uploads/1/3/1/1/131164173/mebugaregox.pdfIn PDF document text
    • http://siwogu.dolcevitaspomeranians.com/uploads/1/3/1/6/131606051/pugijetinulu.pdfIn PDF document text
    • http://files.randrpressurewashingllc.com/uploads/1/3/1/4/131437117/3580070.pdfIn PDF document text
    • http://files.primoshouse.com/uploads/1/3/0/8/130815031/gokefasovemukujak.pdfIn PDF document text
    • http://files.bridgettemontgomeryllc.com/uploads/1/3/0/7/130739653/fasatelizenizopebi.pdfIn PDF document text
    • https://site-1037121.mozfiles.com/files/1037121/tovafuri.pdfIn PDF document text
    • https://site-1037160.mozfiles.com/files/1037160/jamase.pdfIn PDF document text
    • https://site-1036689.mozfiles.com/files/1036689/wobamotalixevuxowisazul.pdfIn PDF document text
    • https://site-1036799.mozfiles.com/files/1036799/21734098281.pdfIn PDF document text
    • https://site-1037205.mozfiles.com/files/1037205/54533784136.pdfIn PDF document text
    • https://site-1036753.mozfiles.com/files/1036753/73628565313.pdfIn PDF document text
    • https://site-1037899.mozfiles.com/files/1037899/lidupijag.pdfIn PDF document text
    • https://site-1036775.mozfiles.com/files/1036775/88674206269.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00005028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5028 5424 bytes
SHA-256: c0384670841eadbcda2187353d6f4a01942387448942e32734d4a3ff88d8e3ec
font_01_sfnt_off000062c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C3 9916 bytes
SHA-256: f36d1ce7a81d8918d9921c004626a9f5a8e43781a5da5486024da2e4700b2f70