Malicious PDF — malware analysis report

Static analysis result for SHA-256 c93ccc889c5d28fa…

MALICIOUS

PDF

37.0 KB Created: 2020-10-15 07:09:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 99571858ca99ee1f89788cb7d7a3f875 SHA-1: 7e9d8812b99829d41c4a50e7b8b472ffa2800e94 SHA-256: c93ccc889c5d28fafdc520539c9ab435bbd57631614d06b3ac16100fdb5a4a9d
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/123?keyword=inspiration+story+in+gujarati+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f87c3a47eb08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f871cd5e3dc9.pdfIn PDF document text
    • https://site-1038780.mozfiles.com/files/1038780/17634063028.pdfIn PDF document text
    • https://site-1043119.mozfiles.com/files/1043119/96982528037.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lulodegoner.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/novovuxosijuzuz_wofabunutigepuw_dugulelura.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/topexukiguf-nulakekez.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/ziwen.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1696278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f878d42c0d9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5f876ba9846c9.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/bibulasejoxuwo.pdfIn PDF document text
    • https://zozilevijuni.weebly.com/uploads/1/3/1/3/131383476/75649d18fa.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/1/0266/9713/8352/files/yahoo_finance_rss_feeds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1051/4334/files/keget.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7285/5957/files/90749049464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8603/6126/files/wileviwevuvufikoxupikaver.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_off000053a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53A4 5292 bytes
SHA-256: d56a4fcc17ac2f62e991c63006290676d2196569839e7fb268e6ed3ff26642ef
font_01_sfnt_off000065b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B4 9620 bytes
SHA-256: 5460eaef3f4a8fa73f67038c4e51999509d298ff06b7c05cf4e91f56869d9d70

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