Malicious PDF — malware analysis report

Static analysis result for SHA-256 e90dc39ce8ff0cdf…

MALICIOUS

PDF

45.7 KB Created: 2020-10-11 15:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 99dbfd426bfe7d6af7d50ad169e4da19 SHA-1: 30c58192475b1e68db61fc2088e1403f24c0f4e0 SHA-256: e90dc39ce8ff0cdf69fa59f8fa972037249144cca0811b8c7a18d87bb25cc59f
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/strik?keyword=swot+analysis+case+study+pdf In PDF document text
    • https://site-1037098.mozfiles.com/files/1037098/jivonivusisewarisowanan.pdfIn PDF document text
    • https://site-1037082.mozfiles.com/files/1037082/juweb.pdfIn PDF document text
    • https://site-1043051.mozfiles.com/files/1043051/xejevozo.pdfIn PDF document text
    • https://site-1036924.mozfiles.com/files/1036924/bawurugetanufapowojixaje.pdfIn PDF document text
    • https://site-1036917.mozfiles.com/files/1036917/baladom.pdfIn PDF document text
    • http://files.oxfordponyclub.com/uploads/1/3/1/4/131454317/xinow-gizumoni.pdfIn PDF document text
    • http://naresi.purpleclovefarms.com/uploads/1/3/1/4/131454766/vumifadajabegewexa.pdfIn PDF document text
    • http://wefuduzi.ivyleaguenursery.com/uploads/1/3/2/3/132303052/79c9ec.pdfIn PDF document text
    • http://fitidogez.hcmyc.org/uploads/1/3/0/8/130814328/2805521.pdfIn PDF document text
    • http://mufapo.willowbendsoapshop.com/uploads/1/3/1/6/131636755/nodugudezenigu.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/5af9a07c-d4f3-4722-a7c6-331fe2aebbe6/fidubizativu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7313dc30-a9dc-4471-8452-a9033855d6c1/44162928546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a531326-d86c-48c1-bc95-1b1479e14ec9/13896321224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be0e9afd-ac10-41c2-944f-09ea07ff0d89/39590072486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/momusopodejojejiriviv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3153/5509/files/define_portal-systemic_anastomoses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/93108224292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9776/3229/files/whynter_arc-12sdh_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/6262/9030/files/best_dual_blades_mhw_iceborne_reddit.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_off000072c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C3 5348 bytes
SHA-256: abef27efd6af0a5575222967a7fd7aec3237bdce0093e9ce30892a6f25c53bd8
font_01_sfnt_off00008518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8518 10600 bytes
SHA-256: a52798d6ef07c15c373430375cff776be0de5e38174935307c2458517b6e2767

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