Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e175388911a146…

MALICIOUS

PDF

40.4 KB Created: 2021-06-26 05:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9463cd51e5b4f617449638c6a26eb56f SHA-1: 56100eab80396bc2b1143743d16e13c4a86c0afa SHA-256: a4e175388911a146cf219b98762a505dd3173ad39e240c1dfd1310d8dfa8ba34
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document is identified as a phishing lure due to its small size, image-heavy content, and embedded links pointing to compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded links likely serve to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9743

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 40 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/r2p3vlihd3090eg86h1htam560/36927578138.pdf In PDF document text
    • http://studiogaleazzo.eu/userfiles/files/zivopi.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/289a9ce1ce186afe447144e35d0b34e8/88519366822.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/25227664568.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/593661ac64aa29c66f9cd9b81a2aac9e/kibevuxokebokox.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776cf75a7ec---mejefenidegevoxenaposubu.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/et1894f1hcvpam8mvh1n9d90t0/19333926710.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///tasisozimasuxibajedifakin.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/mrk9qcv2u8rl1653tekc5tevg7/zipunive.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/468b5e97d6eea63de6199a4e438beca6/47943755623.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/zapofi.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/vd7v1gacc1qkqoie6ete7q9hnp/54272951420.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609fcdab2d467---77842263785.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/94554628386.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/30ab4958eec11494db4746f9df92888f/ligukubilimedeziwixobizux.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/50565520635.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/kojasezemuf.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/fgbusu3nmagokhtpj42jq0drhv/vigerilum.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60b6c11078ca4.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/572552c10198913a61bfa49584c8b235/bosuvexexaronola.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=book+of+secrets+wow+shadowlandsPDF link annotation

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