Malicious PDF — malware analysis report

Static analysis result for SHA-256 805b4026a6254e77…

MALICIOUS

PDF

49.2 KB Created: 2020-10-05 00:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f9f4cf9ac35c4f08684013bf4bb4c6ac SHA-1: be33ce645e35e1165516b52a339ccadb58664364 SHA-256: 805b4026a6254e77718813698ce801034e9d990af70cf42fc03b56e59f1ce0ea
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://cctraff.ru/strik?keyword=benzoin+condensation+catalyzed In PDF document text
    • http://rakofola.windriverstrategies.net/uploads/1/3/1/6/131606901/d7e0635fc68f631.pdfIn PDF document text
    • http://files.wnyhima.com/uploads/1/3/2/6/132681836/duxinuz_bulokujowovag_bukujodojit.pdfIn PDF document text
    • http://xipibudix.permittedtopause.co.uk/uploads/1/3/1/3/131380160/belerodovozomerobeb.pdfIn PDF document text
    • http://files.p-l-a-i-d.net/uploads/1/3/1/0/131070362/1473552.pdfIn PDF document text
    • https://site-1043569.mozfiles.com/files/1043569/8602692892.pdfIn PDF document text
    • https://site-1036725.mozfiles.com/files/1036725/mifagego.pdfIn PDF document text
    • https://site-1036751.mozfiles.com/files/1036751/favodib.pdfIn PDF document text
    • https://site-1037267.mozfiles.com/files/1037267/40821053012.pdfIn PDF document text
    • https://site-1037884.mozfiles.com/files/1037884/buxajuvuwiloxasine.pdfIn PDF document text
    • https://site-1043559.mozfiles.com/files/1043559/sejinitu.pdfIn PDF document text
    • https://site-1037839.mozfiles.com/files/1037839/84595057018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D19 5036 bytes
SHA-256: 39217fcd838e4137401d244597e89868dd7f12f4bc527cb4c95777b8eca17a89
font_01_sfnt_off00007e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E61 10480 bytes
SHA-256: 5c8808c8cfe2e45ab602e87aad6bddf46864c67fc0d350ebb326051f4473f1c0
font_02_sfnt_off0000a269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA269 16148 bytes
SHA-256: 43dd7310e986e37c0562d6efd2a67b6291a0d41fa892ecd43b306c3e7231f7b7