Malicious PDF — malware analysis report

Static analysis result for SHA-256 3686f57be1b3bb33…

MALICIOUS

PDF

45.9 KB Created: 2020-10-03 10:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: d77050d4e0fcaa41f5f0532e07acc3c3 SHA-1: ad2db07ed6aa78ffe54adc47833393d58c0e058c SHA-256: 3686f57be1b3bb33bc426673a3e959407e2c578f200f540c58cc5e86bd746484
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=accouplement+moteur+pompe+hydraulique+pdf In PDF document text
    • http://files.clovisbethel.org/uploads/1/3/0/7/130776864/zuzilorokejusu_tamavomobogame_ganitisadepar_berurigunu.pdfIn PDF document text
    • http://tinuko.dreamcarmediaevents.com/uploads/1/3/0/7/130775897/2071790.pdfIn PDF document text
    • http://files.freedomdolphindiving.com/uploads/1/3/1/3/131380641/029d87015109afa.pdfIn PDF document text
    • https://site-1036991.mozfiles.com/files/1036991/4871205682.pdfIn PDF document text
    • https://site-1036644.mozfiles.com/files/1036644/belukotororusexumal.pdfIn PDF document text
    • https://site-1037864.mozfiles.com/files/1037864/15733502416.pdfIn PDF document text
    • https://site-1038299.mozfiles.com/files/1038299/52310874730.pdfIn PDF document text
    • http://giwedod.laocdb.com/uploads/1/3/1/4/131482916/jagewomum.pdfIn PDF document text
    • http://midovako.sookevet.com/uploads/1/3/1/0/131070841/0f470131b871f7.pdfIn PDF document text
    • http://files.eaposters.com/uploads/1/3/1/6/131636726/e1f2edf58e.pdfIn PDF document text
    • http://files.huntsvillegarageshapeups.com/uploads/1/3/1/6/131636881/cb711.pdfIn PDF document text
    • http://files.klassenlandcattle.com/uploads/1/3/2/7/132740594/laxer.pdfIn PDF document text
    • https://site-1036630.mozfiles.com/files/1036630/75951458701.pdfIn PDF document text
    • https://site-1037211.mozfiles.com/files/1037211/tibopopoxegubul.pdfIn PDF document text
    • https://site-1041081.mozfiles.com/files/1041081/kivekojilozadimireno.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_off0000710c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x710C 5432 bytes
SHA-256: 587e55b90c130e4902c75258506c4db49b808149c2123d88cb6fce2f1c89dfe6
font_01_sfnt_off00008364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8364 12552 bytes
SHA-256: 0cb80368982546c1c51e8ab28c94e7479c7d546a52ed95a9c866599efea224e0