Malicious PDF — malware analysis report

Static analysis result for SHA-256 842b6f63cf6813cb…

MALICIOUS

PDF

59.0 KB Created: 2020-09-30 12:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: f97cf5e05fed6fb7cdc240dcc44ff069 SHA-1: 0f112f469b17dd12dd75a33da8d41eac98ea07a4 SHA-256: 842b6f63cf6813cb545123be66d7c4149223b0dd767bf17d6a92b965f64e423b
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://cctraff.ru/strik?keyword=jock+culture+bedford+reader+pdf In PDF document text
    • https://site-1038597.mozfiles.com/files/1038597/tagokofakotogukawed.pdfIn PDF document text
    • https://site-1036993.mozfiles.com/files/1036993/31353028234.pdfIn PDF document text
    • https://site-1036630.mozfiles.com/files/1036630/22685890700.pdfIn PDF document text
    • https://site-1036644.mozfiles.com/files/1036644/xibikodikalexesoju.pdfIn PDF document text
    • https://site-1037182.mozfiles.com/files/1037182/mujevubi.pdfIn PDF document text
    • https://site-1037177.mozfiles.com/files/1037177/judabisolajan.pdfIn PDF document text
    • https://site-1036635.mozfiles.com/files/1036635/21788282036.pdfIn PDF document text
    • https://site-1037262.mozfiles.com/files/1037262/lejel.pdfIn PDF document text
    • http://files.traumaheilarbeit.com/uploads/1/3/1/4/131438059/462408.pdfIn PDF document text
    • http://xizomux.sixpetalsretreats.com/uploads/1/3/0/8/130814328/f4e0b65f86e7.pdfIn PDF document text
    • https://site-1036722.mozfiles.com/files/1036722/817305752.pdfIn PDF document text
    • https://site-1038869.mozfiles.com/files/1038869/sokeditulowup.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_off0000a9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9D1 5164 bytes
SHA-256: 800c464b5209ef866f12664e470bcc0176735e71ea6a18e54bb906a8b08e760c
font_01_sfnt_off0000bb6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB6F 10440 bytes
SHA-256: e59c1fc935916f9e94c6177e9781d1fb05291590b2cf8010f0bf2df885284350