Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf95dd63f836fb27…

MALICIOUS

PDF

34.2 KB Created: 2020-10-11 02:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 20621cec787714b5a18f66fd9f97a291 SHA-1: e8ea61f86c1d2908bf8191c60932725bd33a6853 SHA-256: cf95dd63f836fb2797a2ce4b088bcf2c01c5b1da3c25ee4dd13bb56ba9db33d0
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/pify?keyword=super+mario+falsh In PDF document text
    • http://nojuxeji.architecture3115.com/uploads/1/3/1/4/131406837/01485506b87.pdfIn PDF document text
    • http://files.tedxyouthlucenacity.com/uploads/1/3/1/4/131453048/5736620.pdfIn PDF document text
    • http://sipexoru.sovereignwellness.org/uploads/1/3/1/4/131406121/zelofebivo.pdfIn PDF document text
    • https://site-1043373.mozfiles.com/files/1043373/87247361582.pdfIn PDF document text
    • https://site-1036644.mozfiles.com/files/1036644/1068000820.pdfIn PDF document text
    • https://site-1043117.mozfiles.com/files/1043117/gunobuduremi.pdfIn PDF document text
    • https://site-1038938.mozfiles.com/files/1038938/rogovut.pdfIn PDF document text
    • https://site-1038790.mozfiles.com/files/1038790/58869478147.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/8b0472f6-f245-412a-85dd-41414abb774d/kuramibakavod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c643197f-a194-4392-aacd-629932dff2ec/betevelujodazagegozugip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a22a325-08ac-4899-afe7-a45714cfe5d2/92475436397.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_off000047e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47E8 5244 bytes
SHA-256: 0df3b724ec41b01e931e747ef37a5ff4ea10ee98aeb8186bdf554095cf40a5c2
font_01_sfnt_off00005996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5996 10280 bytes
SHA-256: 895b42bd715bebf501a0df3bf1005be997a7fa98e97044e0953af1ea2e97fa5d