Malicious PDF — malware analysis report

Static analysis result for SHA-256 700178f0397a132c…

MALICIOUS

PDF

35.5 KB Created: 2020-10-02 01:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 13a84bea94b65d832e0e14ae8efca1a5 SHA-1: f5dd571a71c5d8cb735263022354ecae638507d3 SHA-256: 700178f0397a132cce8656fc176c96d6f34a03ad5aaed78371925e6ba16d2c3e
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not 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=arthritis+research+uk+foot+exercises+pdf In PDF document text
    • https://site-1038401.mozfiles.com/files/1038401/94620592036.pdfIn PDF document text
    • https://site-1037276.mozfiles.com/files/1037276/romimivadexumegoxogat.pdfIn PDF document text
    • https://site-1037169.mozfiles.com/files/1037169/26220559510.pdfIn PDF document text
    • https://site-1036971.mozfiles.com/files/1036971/93168014437.pdfIn PDF document text
    • http://files.huntingtonlandmark.com/uploads/1/3/2/6/132695329/dc721b2f.pdfIn PDF document text
    • http://files.dftly.org/uploads/1/3/2/6/132681392/3388718.pdfIn PDF document text
    • http://kagoboda.caringforzebras.com/uploads/1/3/0/9/130969408/xipejuf_jowoguvojezokij_kowiriro.pdfIn PDF document text
    • http://files.marrakechguidedtours.com/uploads/1/3/0/7/130739947/nitavipij_kajutirudo_gimofe_duwez.pdfIn PDF document text
    • http://xuled.comprehensivewellnesssolutions.com/uploads/1/3/1/4/131413418/rovivatipazi-botugisuda-pijuput-lipajojudowu.pdfIn PDF document text
    • https://site-1037160.mozfiles.com/files/1037160/30169582524.pdfIn PDF document text
    • https://site-1037152.mozfiles.com/files/1037152/fimovajiv.pdfIn PDF document text
    • https://site-1036950.mozfiles.com/files/1036950/fepibogut.pdfIn PDF document text
    • https://site-1041483.mozfiles.com/files/1041483/96907783956.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E13 5332 bytes
SHA-256: 1205e5c188c9785d698560489cbabb7a85d224371ff4c2585942208671651475
font_01_sfnt_off00006034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6034 9652 bytes
SHA-256: 3f5ba16487644c0773bcb7fd80f2ede189a0c35be6c5f92027a37b0fcf4086f1