Malicious PDF — malware analysis report

Static analysis result for SHA-256 93aef6c05dbd3e79…

MALICIOUS

PDF

77.1 KB Created: 2021-02-15 08:15:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 351622094f6981d4200a03981cf1541e SHA-1: 1329cfb77b03188c24668f12010529e922a340be SHA-256: 93aef6c05dbd3e79fda2a4b7da6ae9a9b5632109708ac8c52fa6696bd7b65532
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to link farms hosted on disposable domains, a common tactic for phishing and malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating an attempt to obscure the true malicious destination. ClamAV detection and ML classification further confirm its malicious nature, likely serving as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/123?utm_term=el+hombre+que+calculaba+pdf+descargar+gratis PDF link annotation
    • http://the-job.ru/princess_bubblegum_heroes_wikijzpz7.pdfIn PDF document text
    • https://fakedowekiz.weebly.com/uploads/1/3/5/3/135314463/11977.pdfIn PDF document text
    • http://lifizix.22web.org/43684710467.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/jS1jaij/administrative_assistant_jobs_atlanta.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/jggejdj/run_race_3d_game_download.pdfIn PDF document text
    • https://mutabezikubi.weebly.com/uploads/1/3/4/7/134739743/4782085.pdfIn PDF document text
    • https://vamawawu.weebly.com/uploads/1/3/0/8/130874524/kusutovubevulufaf.pdfIn PDF document text
    • https://cdn.sqhk.co/sononipo/0kgfMrg/54469685537.pdfIn PDF document text
    • https://cdn.sqhk.co/zetuzire/7qnsjg1/39989741071.pdfIn PDF document text
    • https://cdn.sqhk.co/pusuvizodez/cjgjchb/81428546045.pdfIn PDF document text
    • https://cdn.sqhk.co/zamodozitip/jjGEvii/57960423685.pdfIn PDF document text
    • https://sarutofujatazix.weebly.com/uploads/1/3/4/5/134584212/8249098.pdfIn PDF document text
    • http://nout-prodat.site/avg_free_for_android2zo7t.pdfIn PDF document text
    • http://pinixubezanamot.iblogger.org/xaduzix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://putojoner.rf.gd/61890519422.pdfIn PDF document text
    • http://xevazuguvapuj.rf.gd/33663659838.pdfIn PDF document text
    • http://vepimenazipo.rf.gd/project_management_goals_and_objectives_template.pdfIn PDF document text
    • http://zunimesigo.rf.gd/defense_travel_system_contact_information.pdfIn PDF document text
    • http://jumezezufa.rf.gd/grade_1_subtraction_worksheets_with_regrouping.pdfIn PDF document text
    • http://nekogepi.epizy.com/pedesip.pdfIn PDF document text
    • http://pumatelikowe.epizy.com/22627479329.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_off0000ec9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9A 5792 bytes
SHA-256: d986254ad155041a5eef652f089a4e55ac5ad753eac2268e7c6b4a5a75ea31fb
font_01_sfnt_off00010019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10019 11472 bytes
SHA-256: 252702469e984037ea307b1f20d2815709e5bed8b983f0219277476d82ffe654

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