Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e80464ddf86ab9…

MALICIOUS

PDF

57.0 KB Created: 2021-09-22 22:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1ce1e12c38b8ced4209a678d81f0f8f5 SHA-1: a3ff35236e7bfb4166bc560c8613184e178e0941 SHA-256: 48e80464ddf86ab9ec622a13237309138d529b5552c2b94adfdfbcfd121685df
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a deliberate attempt to create a large number of links on low-reputation domains. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are commonly used for phishing or distributing further malware. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7937

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://czyxchem.com/upload/files/45476488144.pdf In PDF document text
    • http://doingthing.com/downloads/blog/geust/files/67178369681.pdfIn PDF document text
    • https://kirmatas.com/userfiles/file/kubosumigibulun.pdfIn PDF document text
    • https://tessuno.com/upload/files/612ed6c00407e.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/73421217436.pdfIn PDF document text
    • https://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/79712787350.pdfIn PDF document text
    • https://impeka.lt/components/com_mijoshop/opencart/image/data/files/famokakajewikoxek.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/11152191566.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/25726815232.pdfIn PDF document text
    • http://canissapiens.com/images/uploads/file/fiwipubefiroki.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161442403f08ea---lagure.pdfIn PDF document text
    • https://www.institutvzdelavani.cz/files/59553136457.pdfIn PDF document text
    • https://halkapsikoloji.net/userfiles/file/zazobujago.pdfIn PDF document text
    • http://tubelessons.net/cms_images/file/36495556997.pdfIn PDF document text
    • https://mamalight.net/business_school/uploads/file/4583168523.pdfIn PDF document text
    • http://medicalproduct.hu/images/files/derijarisatuzunimawoj.pdfIn PDF document text
    • https://cyklo-wellness-penzion-palice.cz/content/tokim.pdfIn PDF document text
    • http://ajitcoatings.com/uploads/sebawewufodexud.pdfIn PDF document text
    • http://studiovalecchi.it/userfiles/files/pataxizisejinesebigum.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613356d036ccf---15620910908.pdfIn PDF document text
    • http://osayit.com/images/file/81360969934.pdfIn PDF document text
    • https://silverbirdmarketing.com/pages/images/file/peloxemosilavevux.pdfIn PDF document text
    • http://4bzsoftware.com/Images_upload/files/sodawasasuduwusakupije.pdfIn PDF document text
    • https://horgaszvelem.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/limigisali.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/14217908530.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=story+saver+downloaderPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA92 17072 bytes
SHA-256: 1ec9f1bc064d212d4086f0043477d719ae765599841f468513f6baac98ddc708

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