Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c8cf28a00f9996…

MALICIOUS

PDF

36.3 KB Created: 2020-10-05 15:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fc8891cdbf1a685fea5ea9f66a6ad2d6 SHA-1: f81c8a556bd63f81464eefc3ae8ab0d78d92040f SHA-256: f2c8cf28a00f9996fa61ddbfd74b6d1ea333ddb98d1b3f8b18f60faa41936899
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=complete+pet+for+schools+pdf In PDF document text
    • https://site-1040125.mozfiles.com/files/1040125/jivixuzubisisemuw.pdfIn PDF document text
    • https://site-1036659.mozfiles.com/files/1036659/xokekawomomofewofovov.pdfIn PDF document text
    • https://site-1036678.mozfiles.com/files/1036678/50008058898.pdfIn PDF document text
    • https://site-1039498.mozfiles.com/files/1039498/jetopud.pdfIn PDF document text
    • http://pavuz.mrsbassmath.com/uploads/1/3/0/8/130874161/3c89323fae3.pdfIn PDF document text
    • http://files.bremnerglassandglazing.com/uploads/1/3/0/9/130969249/guwugenijuwexo.pdfIn PDF document text
    • http://files.gerimontano.com/uploads/1/3/1/3/131378776/6200918.pdfIn PDF document text
    • http://relex.bluebelltrail.co.uk/uploads/1/3/0/8/130874472/runerelafodagut_rokowozifap.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/7692f308-2cea-456f-b2c0-f00b08555bc8/48671242626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c31fd65-70dc-4925-b157-70ca19a71592/96498155781.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_off000052b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52B3 5092 bytes
SHA-256: 464d848cd8a00f99e24572e914429ff511d1ab67aa1d993c88dc72247beb78a4
font_01_sfnt_off000063d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D9 9616 bytes
SHA-256: 0241bbc19277d138eff956aaa22a615692dae3e70ef4b6636fab1afddb38d7ea