Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aeb9279a7c4bb0e…

MALICIOUS

PDF

58.9 KB Created: 2020-09-30 20:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 4fe3e76913389f082270252bf2e368a8 SHA-1: e31005e8e3631b765ef9141f6754fbc88071e806 SHA-256: 4aeb9279a7c4bb0e600a916ffde488965fa52cc32dd6d5b0b92c57561a9751c7
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://gettraff.ru/strik?keyword=multiple+pulse+width+modulation+inverter+pdf In PDF document text
    • https://site-1037237.mozfiles.com/files/1037237/47450535984.pdfIn PDF document text
    • https://site-1036742.mozfiles.com/files/1036742/wigikidojosanin.pdfIn PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/34466779105.pdfIn PDF document text
    • https://site-1037180.mozfiles.com/files/1037180/buwujegugilivemokates.pdfIn PDF document text
    • https://site-1037022.mozfiles.com/files/1037022/43868053773.pdfIn PDF document text
    • https://site-1036925.mozfiles.com/files/1036925/wufizerekavusapefed.pdfIn PDF document text
    • https://site-1038375.mozfiles.com/files/1038375/kovakujakakegar.pdfIn PDF document text
    • http://files.surplusandmore.us/uploads/1/3/0/7/130776855/fuziki.pdfIn PDF document text
    • http://files.victoriawejko.com/uploads/1/3/0/9/130969322/685d34ba.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/6576c0ad-1101-4a06-8f13-847fa16a58aa/37816784864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd2ae283-3772-47c1-9002-cd8ce2835147/komamixuregikagenewigo.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
    • 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_off0000867c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x867C 5436 bytes
SHA-256: 63472735d6481d7c8090f567d0547ea8adab5233394fe1a567f5407e2e9f350c
font_01_sfnt_off000098ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98ED 15488 bytes
SHA-256: 9c2413dc6cda81b0c7fe29eb8a0312418da943054aeebe525e9d1776604729a4
font_02_sfnt_off0000c9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9AE 16140 bytes
SHA-256: 73d102e3e0eae786a94216373848eec30f9cca87951a27ac4721e5055e32bcb8