Malicious PDF — malware analysis report

Static analysis result for SHA-256 b35e0233762de458…

MALICIOUS

PDF

43.6 KB Created: 2020-10-07 20:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 1d8ae317ee5e31adaf857012234343ee SHA-1: e533af0ed56193580fba17caddeb61ead49b9388 SHA-256: b35e0233762de458a9960566e4570212f7421866191b0e039bc81082ab5e5425
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=whatsapp+status++tamil+video+songs+hd In PDF document text
    • https://site-1036781.mozfiles.com/files/1036781/6346220332.pdfIn PDF document text
    • https://site-1040145.mozfiles.com/files/1040145/50711264357.pdfIn PDF document text
    • https://site-1036861.mozfiles.com/files/1036861/11875977541.pdfIn PDF document text
    • https://site-1044200.mozfiles.com/files/1044200/pogotaposofutujopo.pdfIn PDF document text
    • https://site-1038439.mozfiles.com/files/1038439/gijipamafawesafadazikile.pdfIn PDF document text
    • https://site-1036734.mozfiles.com/files/1036734/nidezevilodulol.pdfIn PDF document text
    • https://site-1037837.mozfiles.com/files/1037837/98496190398.pdfIn PDF document text
    • https://site-1039476.mozfiles.com/files/1039476/86950343081.pdfIn PDF document text
    • http://litobofu.southmadisonunite.org/uploads/1/3/1/4/131409236/tamirodetew.pdfIn PDF document text
    • http://files.blessingshairboutique.com/uploads/1/3/1/3/131398555/ziritufoxonuximatamo.pdfIn PDF document text
    • http://files.pentictonexcel.com/uploads/1/3/1/4/131438164/nipenujizobijez-getarugavit.pdfIn PDF document text
    • https://site-1037228.mozfiles.com/files/1037228/34312827716.pdfIn PDF document text
    • https://site-1037867.mozfiles.com/files/1037867/bexomolobumus.pdfIn PDF document text
    • https://site-1042879.mozfiles.com/files/1042879/9546030987.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_off00006c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C33 5348 bytes
SHA-256: 5157abac350c116a1fae3c87a9b52e8c684bbbf2d00a91e63d9f3e693d0cf705
font_01_sfnt_off00007e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E55 10380 bytes
SHA-256: 82ea43dac44a09ef9a5c412e2930765c8d8d1511e44b3ce867e8c40ff06e2869