Malicious PDF — malware analysis report

Static analysis result for SHA-256 8203843401e08807…

MALICIOUS

PDF

75.3 KB Created: 2021-03-23 07:38:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ea93e749109365c345aeb637d462c67c SHA-1: 97b3052301c72c2fa5afd54d2033044db4966a61 SHA-256: 8203843401e0880777d24997b0e56436fbc9a08a6249e470c9af041e56f2e6c2
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of external URIs and the link farm heuristic suggest the document's primary purpose is to redirect users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://vilenefex.ru/wix?keyword=awesome+meme+funny PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467979/normal_6016d9e171f54.pdfIn PDF document text
    • https://bazowumisobebu.weebly.com/uploads/1/3/5/3/135329866/xegugoxeriz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478951/normal_5fe390f770909.pdfIn PDF document text
    • http://xepelewatelaziv.getenjoyment.net/86998794331.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484995/normal_5ff6a9374b703.pdfIn PDF document text
    • http://xojitufos.66ghz.com/dilazoliwudeleze.pdfIn PDF document text
    • https://binigikuvoloxog.weebly.com/uploads/1/3/5/3/135332024/dudonopeti.pdfIn PDF document text
    • https://pagazamis.weebly.com/uploads/1/3/5/3/135310118/4012765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483602/normal_5fda1b7da1095.pdfIn PDF document text
    • http://seweripuwas.mywebcommunity.org/sample_corrupted_file_download.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/647d4bc5-05fc-4b2a-9701-15b8cbdd3f27/navajo_code_talkers_dictionary.pdfIn PDF document text
    • http://kibejulega.epizy.com/febira.pdfIn PDF document text
    • http://zuvuzevo.atwebpages.com/diesel_engine_troubleshooting.pdfIn PDF document text
    • http://pulilidason.epizy.com/emancipation_proclamation_questions_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ca70243-82f6-4899-a81d-df5f030022c4/what_are_the_different_classes_of_antibiotics.pdfIn PDF document text
    • http://botemexake.rf.gd/jekozepewarilub.pdfIn PDF document text
    • http://jutagejefutix.atwebpages.com/35038925568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e27a616-58c1-41bd-92bc-68f4440ee108/vavobodikimizot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a84092e-9bc7-4f0c-99c5-7e7b56ba9651/rowoxusef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f5fb79d-a94b-4837-883d-1436eb8a4349/what_intermolecular_forces_are_present_in_sio2.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_off0000ed73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED73 4756 bytes
SHA-256: 5bc02bec4905578ba1b0a17e774458a576e0c803a26bf44297265029a0ff79e7
font_01_sfnt_off0000fdb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB2 10156 bytes
SHA-256: c412c9a4ff3f05d5bc14d7ac5436d8af3abf99e0fbd22bfe8fdb12d50f96e445