Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8ef17d115ab02bb…

MALICIOUS

PDF

42.6 KB Created: 2020-10-13 22:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d5c84e45aa19f97e353f1c5cb843c6a3 SHA-1: ec58a06e44489d93e3df08fcbf3d17acf4bf1c4a SHA-256: c8ef17d115ab02bb66d8c9fccb506dc509dacc2814fe2b8da832accf92dee086
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=canon+law+marriage+pdf In PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/bewomo.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8980310.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tugunari_fogeze_nezejavoz.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/3794757.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/76c30d49.pdfIn PDF document text
    • https://site-1038526.mozfiles.com/files/1038526/refiviwurukitejujelego.pdfIn PDF document text
    • https://site-1048559.mozfiles.com/files/1048559/tobitirulojom.pdfIn PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/wuxonedatakuzero.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/aa92d.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/1429013.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/laresisif_kigadebokenub_bajutinerid.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/582bfc00-1bf3-40f7-b1a5-f3d98c00feba/fexub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1291b704-4523-42fd-a137-eb932826fb3e/43952069636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbab7237-7d44-4e63-92d2-d9209631d3b4/gifadamit.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_off00006934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6934 5180 bytes
SHA-256: 3368b327dd014987bd2319401213560434593bd27264176693ac8f6f079e2f64
font_01_sfnt_off00007aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACA 10148 bytes
SHA-256: 2c0820dd211f13d3af0406738ca5cb8cc9445dd296d36f541abaa8e465c341c2

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