Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4bbe2a7d8b019e…

MALICIOUS

PDF

71.1 KB Created: 2021-03-27 19:55:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ca887439db6e593eb87ddf94a0214f62 SHA-1: 24ced10f00a071f54a8e7cec7a5dfa04e6be7f96 SHA-256: 9a4bbe2a7d8b019edf970f41207835bd4da83d2035d77370acbf8f7a98175bda
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with the primary one being 'https://lozipotod.ru/wix?keyword=calendario+junio+2020+para+imprimir+gratis'. 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.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://lozipotod.ru/wix?keyword=calendario+junio+2020+para+imprimir+gratis PDF link annotation
    • https://cdn.sqhk.co/nobutowug/oiaggYt/colored_bumper_plates_for_sale.pdfIn PDF document text
    • http://dujaliz.iblogger.org/esma_remuneration_guidelines_aifmd_2013.pdfIn PDF document text
    • https://cdn.sqhk.co/nozedimasav/ihr0t1h/watijatotenuju.pdfIn PDF document text
    • http://spainwow.pro/girokusimarum5adm.pdfIn PDF document text
    • http://letgtma.bid/52668246917626cu.pdfIn PDF document text
    • http://zhk-samolet-krasnodar.info/blackmagic_atem_software_download595n8.pdfIn PDF document text
    • http://tohld.in/full_blood_count_sample_reportzfv4j.pdfIn PDF document text
    • https://cdn.sqhk.co/soxesemu/hiOgchc/91288514790.pdfIn PDF document text
    • http://megegizob.iblogger.org/importance_of_balance_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/ifDWusf/soketovixidolebib.pdfIn PDF document text
    • http://btsworld.org/1814380383095p12.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/VNjjxZP/41323255054.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sugigujetobil.epizy.com/vifutotufatesulugelekozow.pdfIn PDF document text
    • http://nexaware.epizy.com/ap_world_history_practice_exam_answers.pdfIn PDF document text
    • http://migusopugaj.epizy.com/analog_synthesizers_mark_jenkins.pdfIn PDF document text
    • http://lobulowigewimu.epizy.com/character_creator_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/47926391250.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/superior_vena_cava_syndrome_treatment_guidelines.pdfIn PDF document text
    • http://ravetedenafow.rf.gd/abbyy_finereader_editor.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/spotify_apk_mod_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/77953189582.pdfIn PDF document text
    • http://xirixedojaziw.epizy.com/kusutoxudo.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/renal_disease_nutrition_guidelines.pdfIn PDF document text
    • http://pofulexurukuka.rf.gd/64951451075.pdfIn PDF document text
    • http://renureva.epizy.com/28853542177.pdfIn PDF document text
    • http://rebobimakefeli.epizy.com/berilevolanok.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_off0000d5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D1 5536 bytes
SHA-256: bc0f998ba19af5bf6a830fba3b4aaf964e806d395d07ab248ec6f012490f90a0
font_01_sfnt_off0000e887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE887 11584 bytes
SHA-256: 5f84d46630ab116f505b5de57cb24e6c58008cad2048333a98134ea6c5d1e007

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