Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b6632f2947a7fa…

MALICIOUS

PDF

127.7 KB Created: 2021-06-11 09:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: daa7c07f27b2250b970cda8bcdeee5f7 SHA-1: cd6cd5325a94410bf8fcd1b83452409508e35566 SHA-256: 62b6632f2947a7fa9a4f25f0119ab51e039281c61a1b4fab941bdc3c18d453bc
154 Risk Score

Malware Insights

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

This PDF file functions as a link farm, directing users to various compromised WordPress sites and disposable hosting domains. The primary lure appears to be 'Pokemon sword for yuzu download', suggesting a phishing attempt to trick users into downloading malware disguised as game software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely leading to the execution of further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9624

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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://coretry.ru/uplcv?utm_term=pokemon+sword+for+yuzu+download PDF link annotation
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087162fd0aaa---45712462262.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/1635179aad1b25ea75386f1e69375025/66805640785.pdfIn PDF document text
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/lufuwofodafuzi.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a330773edde---48507360396.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607443f865b0f---noreno.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/1uvhb4u274ohs6q6o7iercf72g/81729798851.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16089055607dd7---39907390091.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e66a16b97b---25901416854.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/65538794129.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d8ba81788---muzawutisesebapo.pdfIn PDF document text
    • http://texmet.pl/userimages/file/35266417624.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/7006d124a9a37d9a5975c2e914170ed9/rezejosefepixalinudaja.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b740a876971---25055341453.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/3q9ip3rt0m78nnfmeftoc9sqk6/widabenasarudi.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/mefatowuwemujolax.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160881e74b0651---93558448633.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/mtkuf9ccm030o7b4i0373pd5uq/tuxasabe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F63 23996 bytes
SHA-256: 0746231d7603ba7724deff39da35e9999fb70408bfee815bd49c092102d75bb0
font_01_sfnt_off0001d78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D78D 5360 bytes
SHA-256: c35a2daa43ed41b51110918528089763b52c40fbc90440ccfa7b237928e50ea2
font_02_sfnt_off0001e9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E9CF 1580 bytes
SHA-256: 3358a6437549343507701e44f11cf0d189771a3783ebd05913451af96e685fc6

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