Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5780db62706043a…

MALICIOUS

PDF

58.0 KB Created: 2020-10-06 13:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 707baff53958deb8a86e725dda39df94 SHA-1: d71076490105836be10b78569aa6200f585684ec SHA-256: b5780db62706043a4b1d9ef0b9ea1f8780f1017c7175f0334b53120ae74ea65f
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=solucion+de+situaciones+contextuales In PDF document text
    • http://jogagumek.skilledpaint.com/uploads/1/3/1/0/131070894/jidebuzizeva.pdfIn PDF document text
    • http://files.relaxmassagetherapyclinic.com/uploads/1/3/1/4/131437322/237616.pdfIn PDF document text
    • http://lubimexe.bearstales.com/uploads/1/3/0/8/130874379/navilofunu_guwozolomux_zifadaret_bupiroxano.pdfIn PDF document text
    • http://files.broncohack.net/uploads/1/3/1/0/131070845/3377002.pdfIn PDF document text
    • http://files.joshsaleh.com/uploads/1/3/2/8/132814930/juvawe.pdfIn PDF document text
    • http://lileza.laplayaatthestrand.com/uploads/1/3/2/6/132680981/gumomuraxi.pdfIn PDF document text
    • https://site-1038341.mozfiles.com/files/1038341/nefegewanumuv.pdfIn PDF document text
    • https://site-1036791.mozfiles.com/files/1036791/foxunasufut.pdfIn PDF document text
    • https://site-1036850.mozfiles.com/files/1036850/karozisafibisagepowif.pdfIn PDF document text
    • https://site-1037893.mozfiles.com/files/1037893/faruguwo.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/f9b02e64-0be8-4f8d-8078-279b1279099e/26269063653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5688659-d9a5-478c-994b-99e1419396e5/36005709681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bce7a2f8-e5d5-4315-b44b-d9ae3a1c887c/mevifaziwebe.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_off0000a2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2F7 5008 bytes
SHA-256: 1ea6637ac2b4b245fae5df5f28e7a62ed75e65570edff202f33fbdb4e920fb78
font_01_sfnt_off0000b415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB415 12036 bytes
SHA-256: 5808d8835456f1f66bf28947481095dec46b53a60d06c0224ef84a12f192e3f7