Malicious PDF — malware analysis report

Static analysis result for SHA-256 7425658a214e6451…

MALICIOUS

PDF

91.5 KB Created: 2021-04-01 01:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 34237079310df4a7cc332fb3a5a85643 SHA-1: 78beb006ab373dfff7b44e055a9ecccedd19ab72 SHA-256: 7425658a214e64518ce5b4b4e2ac382a933a63abfafa26c3d4d1804a2c430a0e
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains keywords related to IELTS vocabulary, indicating a lure to disguise the malicious intent. The presence of external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly suggest this PDF is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://zajinet.ru/award?keyword=vocabulary+for+ielts+pdf PDF link annotation
    • http://ca-management.website/93485475836vbneo.pdfIn PDF document text
    • http://sait-ok.ru/58016290820midl0.pdfIn PDF document text
    • http://wunowixumofe.22web.org/the_zone_of_proximal_development_zpd_is_a_measure_of_quizlet.pdfIn PDF document text
    • http://jekebes.iblogger.org/ameloblastoma_mandible.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/kogegatoporipufikiv.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/30285602773.pdfIn PDF document text
    • http://raftgjgr.space/abstract_reasoning_test_with_answers_free_downloadqa6tm.pdfIn PDF document text
    • http://abistrans.ru/little_red_riding_hood_short_story_charactersnx2m1.pdfIn PDF document text
    • http://zufonirawanowo.iblogger.org/android_google_assistant_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/towivo.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/how_is_deprivation_of_liberty_authorised.pdfIn PDF document text
    • http://mopowataxix.medianewsonline.com/27925805704.pdfIn PDF document text
    • http://sadipize.scienceontheweb.net/belajar_jawi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xusixuxoribixe.rf.gd/96020512114.pdfIn PDF document text
    • http://netasok.rf.gd/20871639656.pdfIn PDF document text
    • http://noratev.myartsonline.com/low_frequency_response_of_bjt_amplifier.pdfIn PDF document text
    • https://5862e4ea-63a6-4c92-af93-e06d02d1a664.filesusr.com/ugd/eaa371_1dae62cb5a564666833def7b8a777db2.pdf?index=trueIn PDF document text
    • https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_6ab724b55b094ca2b51af71c55b0aea8.pdf?index=trueIn PDF document text
    • http://nozuwodapa.epizy.com/fiocco_allegro_violin_sheet_music.pdfIn PDF document text
    • http://kuxadob.rf.gd/clair_de_lune_piano_sheet_music_free.pdfIn PDF document text
    • http://rofijig.rf.gd/foxemepigemidolizoze.pdfIn PDF document text
    • http://lobivovakebala.epizy.com/zumabi.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/sobidimezesusabir.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 7

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_off00012c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C73 5356 bytes
SHA-256: 2d65cdbcfc56b98842f67ff893ea0559042bc7c68d5ea4c581a61282a6cf1cb4
font_01_sfnt_off00013eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EBA 9944 bytes
SHA-256: fc798e760516132861b1722318925cee9594c217f27a6b212d3ff478fe84b569

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