Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8962dfa8bcca5bd…

MALICIOUS

PDF

47.6 KB Created: 2020-10-02 03:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 42cba94672502e2976be7dc0aee9d4c2 SHA-1: bf869e4ce817cd6a0a8d7b5eb0c5e5c8d4927066 SHA-256: d8962dfa8bcca5bdfe03e1d8cdc19a144a683be958ea17db360bd4ca6be18e6b
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://ggtraff.ru/strik?keyword=kendra+gets+loose+for+big+members In PDF document text
    • http://files.ldfestival.com/uploads/1/3/1/4/131453268/geritozuwaguxevejeme.pdfIn PDF document text
    • http://files.tourfitgrips.com/uploads/1/3/0/7/130739415/c6737d9926.pdfIn PDF document text
    • http://files.horshampacovid19.org/uploads/1/3/1/1/131164081/pavozujisifa.pdfIn PDF document text
    • https://site-1036807.mozfiles.com/files/1036807/62872995459.pdfIn PDF document text
    • https://site-1037237.mozfiles.com/files/1037237/82866097450.pdfIn PDF document text
    • https://site-1036879.mozfiles.com/files/1036879/10367548654.pdfIn PDF document text
    • http://xodixatiw.allyjadeart.com/uploads/1/3/0/7/130739291/2402816.pdfIn PDF document text
    • http://files.derricklrandall.com/uploads/1/3/2/7/132710697/1795e19de33c72.pdfIn PDF document text
    • http://files.northsuburbanconcertband.org/uploads/1/3/1/3/131381237/403314.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/1/0433/9915/1768/files/conditional_probability_worksheet_12-2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2678/6715/files/sodux.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_off00007dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD1 5336 bytes
SHA-256: df90e65a28b07437ef2b45142deaffa81353307d6742ef28f3c1d842f1343353
font_01_sfnt_off00008fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE5 9940 bytes
SHA-256: 527f482df13def1fed577cee8fbc7159143c9b520c23d8d50408af1acfe0ec52