Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd38be772e3ea9a1…

MALICIOUS

PDF

54.0 KB Created: 2021-09-09 13:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8392459920fd9c8c1644049713b02301 SHA-1: 93dc40eb3bb09ce0fd41c982d12fe9def38da52b SHA-256: cd38be772e3ea9a183f702b95e879e68427ff3542e7179d54505b06c111783f9
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5894

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://queure.ru/uplcv?utm_term=attacking+anxiety+and+depression+workbook+pdf PDF link annotation
    • https://infypos.com/infyposcms/media/xesikinewitok.pdfIn PDF document text
    • https://labelmarket.pl/data/file/bevilubujuxigizarukem.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/29110532357.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/wamera.pdfIn PDF document text
    • https://stotex.rs/files/54086962051.pdfIn PDF document text
    • https://cordovajewelry.com/images/file/22350051123.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pojosakuberaw.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/gejim.pdfIn PDF document text
    • http://print-resource.co.uk/ckfinder/userfiles/files/devotuwatakuvobejebaru.pdfIn PDF document text
    • https://cardolf.ro/files/ratebubabal.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/4953989387.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/zudixapumorozod.pdfIn PDF document text
    • https://12waktu.com/contents/files/32154157853.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/nurajosowolomeriromazi.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/36119607253.pdfIn PDF document text
    • http://leguido.net/files/tulolegogofekuramib.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/f4a0cf5ec0bba47649443e939f0274dc/78713006979.pdfIn PDF document text
    • https://hw-power.com/uploads/ckfiles/files/6138cf7102201.pdfIn PDF document text
    • http://laconchigliacasevacanze.it/userfiles/files/16203590534.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/19269306521.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/daxuge.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/14063779313.pdfIn PDF document text