Malicious PDF — malware analysis report

Static analysis result for SHA-256 d253b71e06500c3f…

MALICIOUS

PDF

48.6 KB Created: 2020-10-01 17:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: a48a81dd8c7ec3aa7addf2a56bd44b1e SHA-1: 7b97d6b736ac167d4588470448efe16a700678cf SHA-256: d253b71e06500c3f9ec4d22e7c393065b874956a24baa31ab7378a3a7ae1ea37
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=climate+change+adaptation+in+bangladesh+pdf In PDF document text
    • http://files.georgeryall.com/uploads/1/3/1/8/131856433/fa123d.pdfIn PDF document text
    • http://vovubo.tcsocalfastpitch.com/uploads/1/3/0/9/130969300/3316670.pdfIn PDF document text
    • http://files.its-true.org/uploads/1/3/0/7/130776601/1949347.pdfIn PDF document text
    • http://files.callylawson.co.uk/uploads/1/3/1/8/131871894/sijunajabizezu_zeridoposaju_nekutodosoma.pdfIn PDF document text
    • http://files.filipinocursillosf.org/uploads/1/3/1/3/131378990/sofalevabe.pdfIn PDF document text
    • http://files.paultraviscrybaby.com/uploads/1/3/1/3/131378852/6326288.pdfIn PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/sitaxudam.pdfIn PDF document text
    • https://site-1038650.mozfiles.com/files/1038650/15411809287.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/15a70119-4e31-4f49-bf33-68e3151d5684/88929162971.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0d05c6a-4876-4fdd-a839-172cdea8a639/53378655778.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_off00007f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F52 5520 bytes
SHA-256: c1a92af3fdae5129b9047f0bca96d7dd106f68e53de4b5fa3efff968d1d52913
font_01_sfnt_off000091e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91E2 10552 bytes
SHA-256: e28dd238c2b0be4984308451068e135e9009aa26fa9211e56ceee40817bbcbfb