Malicious PDF — malware analysis report

Static analysis result for SHA-256 df48d9519af2858d…

MALICIOUS

PDF

43.4 KB Created: 2020-10-02 15:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ca0b768ecf649b45f961537ee42e54b7 SHA-1: fc0857f0e3f26eaa60c1666798c5777b35a10bc9 SHA-256: df48d9519af2858dc3b99dabd019a1171c747560d10b73628395b1728297e4d6
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=three+way+anova+manual+calculation In PDF document text
    • http://vanokek.jharidingacademy.com/uploads/1/3/1/3/131380081/munoze.pdfIn PDF document text
    • http://files.seawhiff.com/uploads/1/3/2/6/132695829/6117726.pdfIn PDF document text
    • http://kojabub.dorsetbumptobabyshow.co.uk/uploads/1/3/0/7/130740434/62e3a6.pdfIn PDF document text
    • http://files.allmetalcornerguards.com/uploads/1/3/1/4/131437977/5540224.pdfIn PDF document text
    • https://site-1036898.mozfiles.com/files/1036898/14786805252.pdfIn PDF document text
    • https://site-1038471.mozfiles.com/files/1038471/79250656116.pdfIn PDF document text
    • https://site-1038840.mozfiles.com/files/1038840/kigidi.pdfIn PDF document text
    • https://site-1040132.mozfiles.com/files/1040132/foxovekunuwefimuponaril.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/8568c81e-7ffc-4ea4-8b40-bdbea92bbdcf/xebesapakemupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b1d9039-f4fe-4a63-8b8a-c0a5d68be41e/wajuvuxuvegufogu.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_off00006d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D67 5064 bytes
SHA-256: ba5c55a5b5c00301cf4757e093afd44bb7a7309562e2c937994d58423324bbb9
font_01_sfnt_off00007e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E90 10068 bytes
SHA-256: 27c5173c3715d34a2845ed02b33bfc883c1439fc7f253375c5e4c1ffbc2376cc