Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc3c85f0b34de13…

MALICIOUS

PDF

67.1 KB Created: 2021-02-19 00:40:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 15f134f4a7c077e248302c5f96b9c37a SHA-1: e7930fb18bce1f438361fb305b2027f03bd87acd SHA-256: 1dc3c85f0b34de134194966bbe574e268cb658afdc201c9581c82e738cffbfcc
66 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which points to a suspicious domain ('leonvi.ru') that is flagged as an external URI. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm designed to redirect users. While no scripts were explicitly extracted, the presence of embedded URLs and the ML detection suggest a malicious intent, likely to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=plot+fractions+on+a+number+line+worksheet PDF link annotation
    • http://bhd-management.space/occupational_therapy_clinics_near_meepkv6.pdfIn PDF document text
    • http://goxakawelapa.22web.org/archinteriors_27.pdfIn PDF document text
    • http://parujom.iblogger.org/suvemukigawivaz.pdfIn PDF document text
    • http://getsol.xyz/video_games_to_play_while_high_redditxml6r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://movutep.rf.gd/komewudamakabek.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/freeport_texas_tide_report.pdfIn PDF document text
    • http://gelapuduwo.epizy.com/canons_of_dort_reformed.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/bsc_online_registration_form_gujarat_university.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/duke_basketball_report.pdfIn PDF document text
    • http://jibisisejuw.rf.gd/android_api_26_migration.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/answer_to_question_what_motivates_you.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/decathlon_uk_bikes_size_guide.pdfIn PDF document text
    • http://vivimaga.epizy.com/72551282281.pdfIn PDF document text
    • http://bewumafovalol.epizy.com/58611312282.pdfIn PDF document text
    • http://besuwodusibix.rf.gd/fetal_macrosomia_management_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/wujijetovogafumivedu.pdfIn PDF document text
    • http://kagokonutuvep.epizy.com/bathukamma_telugu_audio_songs_free.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_off0000ca2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2A 5416 bytes
SHA-256: 1a492b3652011c8435be180286829da456234430b3838dc9bd67162e9b995e65
font_01_sfnt_off0000dc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC80 10420 bytes
SHA-256: 374e4efb1419ddcb8578e85849f12271a717cefbd62b6942be6978ab2ca19655

Open this report in the interactive analyzer, or submit your own file for analysis.