Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb8922603baceaa…

MALICIOUS

PDF

72.8 KB Created: 2021-02-18 22:26:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d2689783cca277cdaa75da373f48d187 SHA-1: 21cbe0e57f334931da9c332a2b95d239b91bfcaf SHA-256: 6eb8922603baceaa244ed388eb343d9528a032290f9b2c0753817c27efeb23dd
126 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ClamAV and an ML classifier. It contains multiple embedded URLs, including one that appears to be a redirector for a link farm, and another hosted on disposable infrastructure. The document body, though partially corrupted, suggests a lure related to "why is samurai champloo good", likely to trick users into visiting these malicious sites.

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://jacksth.ru/123?utm_term=why+is+samurai+champloo+good PDF link annotation
    • http://cozyplacefor.rest/25255360450hk832.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/bxniadq/workbench_project_management_software_reviews.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455380/normal_5ff411bee41d0.pdfIn PDF document text
    • http://xewixejixukumes.22web.org/mac_spoofing_android_without_root.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwuxa/ihIgige/is_apple_music_included_with_amazon_prime.pdfIn PDF document text
    • https://cdn.sqhk.co/gedofovel/eoiaIhb/mibuvimavet.pdfIn PDF document text
    • http://interbankdigital.com/easy_vanilla_cake_recipe_without_baking_sodam2fal.pdfIn PDF document text
    • http://remastacer.com/geometry_practice_worksheets_grade_6nlwc0.pdfIn PDF document text
    • https://cdn.sqhk.co/fisejadiruw/jQjahgy/reverso_french_english_app.pdfIn PDF document text
    • http://sendgrid-de.com/shrimad_bhagwat_geeta_in_gujaratiuwtfv.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/4c9Mgg2/zefakumurofaxadazamoz.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/fupanabivote/28593865921.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/best_tour_itinerary_format.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/xuligekalaf.pdfIn PDF document text
    • http://jilutuve.rf.gd/staff_accountant_job_description_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/fright_night_2011_full_movie.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_off0000df5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5A 5600 bytes
SHA-256: 22ed47a9f6452bd2f8fa0ee787c36cb8ab776e17c01df8e025214d3bcfa40f71
font_01_sfnt_off0000f24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24C 10668 bytes
SHA-256: 4a8a1b811202aadb21156745b7b3ac7f4cad3229b8800dea6dc6eb3174ce612c

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