Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b1c5123b7ebcc09…

MALICIOUS

PDF

72.5 KB Created: 2020-10-01 09:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: ad3242ab5236df139b13a98f10fd39de SHA-1: 5797a0d924c3b84212f0c341a708b6fb20f3ef1c SHA-256: 1b1c5123b7ebcc09e60d5f049a9b6549ccc7950872295d66cf9b56ef31082fa6
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/strik?keyword=insuficiencia+cardiaca+congestiva+tratamiento+farmacologico+pdf In PDF document text
    • http://duzuzelu.niwawriters.com/uploads/1/3/0/7/130740510/2163576.pdfIn PDF document text
    • http://beferexi.careerscentralvictoria.com/uploads/1/3/1/4/131452883/284198.pdfIn PDF document text
    • http://files.sea-griffin.com/uploads/1/3/0/8/130813888/6431137.pdfIn PDF document text
    • http://files.heywoodracing.com/uploads/1/3/1/4/131437926/soxidudisejo.pdfIn PDF document text
    • https://site-1036656.mozfiles.com/files/1036656/xojofirox.pdfIn PDF document text
    • https://site-1037829.mozfiles.com/files/1037829/97430300760.pdfIn PDF document text
    • https://site-1038599.mozfiles.com/files/1038599/47625454457.pdfIn PDF document text
    • https://site-1037207.mozfiles.com/files/1037207/18958701604.pdfIn PDF document text
    • https://site-1036850.mozfiles.com/files/1036850/51844667597.pdfIn PDF document text
    • https://site-1036814.mozfiles.com/files/1036814/45365771863.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/64676914791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/5578/7681/files/fuzzy_lookup_add-in_for_excel.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9F 5356 bytes
SHA-256: 3e79c90676d123057676d4802d79f69b54689f031ad01597a2e2d8fa9955c180
font_01_sfnt_off0000dfc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC1 11196 bytes
SHA-256: 08c49570b2c5456a9b40aa296b953f3ef454a79f8e1856545d2c41c9713d2523
font_02_sfnt_off00010421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10421 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333