Malicious PDF — malware analysis report

Static analysis result for SHA-256 3828d443791ba8f4…

MALICIOUS

PDF

76.0 KB Created: 2021-04-01 20:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 29becd49eee70fe83da957dde6425b88 SHA-1: 4f16390ccf1db1857fe9e7e647939961d747bc22 SHA-256: 3828d443791ba8f44bf0781e56e306aecf75c1e93d47a626645c805276293545
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary one pointing to 'xezojetit.ru'. Heuristics indicate this PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/123?utm_term=aviation+english+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476142/normal_60543269d6153.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/best_history_of_china_podcast.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488817/normal_5fd881c8e7e25.pdfIn PDF document text
    • http://fakaluwu.scienceontheweb.net/mofilesinan.pdfIn PDF document text
    • http://mp4.design/bugatti_hd_wallpapers_1080pi7k35.pdfIn PDF document text
    • http://golixudib.mypressonline.com/sasolifolesugazigonafa.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/acting_101.pdfIn PDF document text
    • http://razvivatel.blog/6865431036eomkc.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/12748916462.pdfIn PDF document text
    • http://mugukix.mygamesonline.org/lebinukis.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/graphic_design_essay_topics.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/us_anthem_piano_sheet_music.pdfIn PDF document text
    • http://closemaze.com/92519070310xfe6j.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/8159c32b-9ef6-416f-b801-ede701077633/romeo_and_juliet_law_colorado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/204d55e7-4ec7-4b93-be48-0d1df8a2abca/vingcard_2800_locks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc38ea3-5e10-4eee-ba2a-202c45a7a2b8/vozabojimakudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/319d0356-7f65-4d2e-baf5-8dbbce92d551/wenemituzefanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92c2c894-175e-4545-85e2-fc23970c484c/lagikasunovonupajaxozuxax.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53B 5460 bytes
SHA-256: b9998e256658541b3225b25db5b1f1ac1834642a4431d0bda5585d96dd1d755f
font_01_sfnt_off0000f7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 14096 bytes
SHA-256: 2c14cd765e2c261aa285023308e08649760eb5814e4ff6f82c182ffefc2e3b9e

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