Malicious PDF — malware analysis report

Static analysis result for SHA-256 b93b2e4ceef82130…

MALICIOUS

PDF

53.6 KB Created: 2020-10-02 06:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fe00044504273176d05313a7d8a41963 SHA-1: b6b7233070e52c7ada6bdb4ed926817a2639ebe2 SHA-256: b93b2e4ceef82130f5333bff8d33b2a22e7220fe02a9ec7eb76efc77db179723
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://ggtraff.ru/strik?keyword=assassin%2527s+creed+odyssey+the+dagger In PDF document text
    • https://site-1037187.mozfiles.com/files/1037187/jufaporivaradatidabobizez.pdfIn PDF document text
    • https://site-1037848.mozfiles.com/files/1037848/sawedijisufafi.pdfIn PDF document text
    • https://site-1037846.mozfiles.com/files/1037846/kikewa.pdfIn PDF document text
    • https://site-1036816.mozfiles.com/files/1036816/23468702863.pdfIn PDF document text
    • http://sutewu.tbabcockhoney.com/uploads/1/3/1/8/131856669/vifadabulok_regubezuburigu_jurujo_fexumapo.pdfIn PDF document text
    • http://gatazusi.insightsplatforms.com/uploads/1/3/0/7/130775598/5835727.pdfIn PDF document text
    • http://walusivok.spacetimeandquantum.com/uploads/1/3/2/8/132815014/6210335.pdfIn PDF document text
    • http://files.ntfbiac.com/uploads/1/3/1/4/131409305/3598749.pdfIn PDF document text
    • https://site-1038944.mozfiles.com/files/1038944/12191274936.pdfIn PDF document text
    • https://site-1037916.mozfiles.com/files/1037916/11521758724.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8382/7862/files/is_unemployment_debit_card.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5247/3252/files/gitatazikasiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/9555/1903/files/94158064282.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_off000094c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94C9 5292 bytes
SHA-256: 3fad90714cf13930d6a7cb017d22fcfcffe47401e33fb8b4688d1be6933cded3
font_01_sfnt_off0000a6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D3 10316 bytes
SHA-256: fb2a6e3ac3345ebe3bb398ace993314a7107b28f55f6b5b9eec0b140c562c2fa