Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f0cbe762b15c45b…

MALICIOUS

PDF

76.6 KB Created: 2021-04-06 23:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4c6f83aaf27d1eaadfce6e0931ee728c SHA-1: 082948dd3f2e0903a1cf968eee71d496f1a3a04b SHA-256: 9f0cbe762b15c45bfc99fbe10cc1e51d780539b3ce885bad376376a6465389fc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to obscure malicious destinations. The document body, though heavily obfuscated, contains references to 'piano sheet music', likely a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/123?utm_term=it%2527+s+you+zayn+piano+sheet+music PDF link annotation
    • https://cdn.sqhk.co/wisulekekij/ghifn9v/bigakomunegojijevipawef.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/rain_bird_esp-rzx_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/jgthfkX/5149055831.pdfIn PDF document text
    • http://saxozumipelezip.22web.org/balance_sheet_means_what_in_marathi.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzexesetaba/gfFQhb7/administracion_de_recursos_humanos_definicion.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/bEiNJFW/38254763761.pdfIn PDF document text
    • https://cdn.sqhk.co/nazutupim/3jd9qia/14579932348.pdfIn PDF document text
    • http://lulelege.iblogger.org/how_did_peloponnesus_help_the_development_of_greece.pdfIn PDF document text
    • http://jonebukusopovet.mygamesonline.org/assessment_and_management_of_cauda_equina_syndrome.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/7K1DZo6/zombie_hunting_simulator_codes_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/xugiwatokax/hfhg2AE/1667887035.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/ggigegh/gararulejilibafakotol.pdfIn PDF document text
    • https://cdn.sqhk.co/fusozuwalas/Tghghgj/58890110419.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/exponential_equations_and_inequalities_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/how_to_heat_a_greenhouse.pdfIn PDF document text
    • http://totofexux.epizy.com/chronic_pancreatitis_treatment_guidelines.pdfIn PDF document text
    • http://koxolavomuzo.myartsonline.com/uht_pasteurization.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/pemev.pdfIn PDF document text
    • http://nazozogev.epizy.com/aftermaster_pro_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/chatting_karegi_kya.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_off0000ec20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC20 5168 bytes
SHA-256: 72c3bb232e1df82f854fa71ebf0a162b4427ac6fafca2ce37df3a7fdf9fa2a1f
font_01_sfnt_off0000fdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAC 11564 bytes
SHA-256: 65548f025e786afadb98ff18efb5cae0a0bb647a018aeb0ad21d8f0ca50bc837

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