Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c6a32dcb093fa69…

MALICIOUS

PDF

40.4 KB Created: 2020-10-04 09:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 55cb8a8c750b169022c5e70bc4918854 SHA-1: 6f57ca3902039938102ce8b7e35f572692c4317e SHA-256: 4c6a32dcb093fa699adbaa9592039e3fc5e74f576d72e47e15bead230ddc5d7f
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://cctraff.ru/strik?keyword=mary+skelter+job+guide In PDF document text
    • http://files.bradshawhomeinspections.com/uploads/1/3/0/8/130814382/77c7931c68a59e.pdfIn PDF document text
    • http://vikikop.elsolpto.com/uploads/1/3/1/8/131871478/24060363.pdfIn PDF document text
    • http://files.blonde-intelligence.com/uploads/1/3/1/4/131438240/rutufol_wazabat.pdfIn PDF document text
    • https://site-1036753.mozfiles.com/files/1036753/73905766543.pdfIn PDF document text
    • https://site-1041613.mozfiles.com/files/1041613/zusor.pdfIn PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/balijarozaforaxo.pdfIn PDF document text
    • https://site-1043405.mozfiles.com/files/1043405/xamabibowati.pdfIn PDF document text
    • https://site-1036834.mozfiles.com/files/1036834/45996877326.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/593b3ea8-1e73-4ace-bcea-4e5af381e858/63870222859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d67c8fc5-cdee-4eb2-875e-9a98c79b17f0/zevoronaxudobuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/342bec0c-72fd-4c3e-bfb9-b0e0aa481d96/65177119314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49bd3c95-554a-4c0c-bfbc-bb920d6154ba/jezizogijusajavovak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d4e1985-1ffd-4d94-8c4c-9b5fb0f4c5cc/teguwobufokinofuweromudi.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_off00005ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF1 5380 bytes
SHA-256: fb8308860bb8a84d90ed60359b198117c9be2c95259b5648fbdef59e225f6249
font_01_sfnt_off00007266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7266 10408 bytes
SHA-256: fff86a711a9fcd3a2c7d6934de9effa236f8dfd190ac9a6d8b13d863711903ae