Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0f259f709c720b…

MALICIOUS

PDF

66.5 KB Created: 2021-09-16 00:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e2062bd5642e00a9a2dc21a7ca0a8211 SHA-1: 2557fc4b4ff692a59965c6e8c3aa77d74f7b948f SHA-256: fc0f259f709c720b540a852b237a718910edc9e3e72f9c0be2a2862d5f722ebb
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to disposable domains, indicating a link farm designed to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8255

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 https://benqmusicworkshop.com/fupload/file/63342131557.pdf In PDF document text
    • http://mothertheresapublicschool.com/userfiles/file/36479395021.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/gawujeko.pdfIn PDF document text
    • http://teknis.it/userfiles/files/doxijuvazoranazakinov.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/60001131840.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/56122901689.pdfIn PDF document text
    • http://weilandvloeren.nl/fckimages/ruwuf.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/97683620282.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/nilimoxevinudibav.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/zezezamulatigadisipe.pdfIn PDF document text
    • https://sokolzgierz.pl/web/uploads/files/7618410234.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021090435948_299421729.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/ruterudefojev.pdfIn PDF document text
    • http://teen.plovdivweek.com/js/ckfinder/userfiles/files/43861599884.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/sapujimeg.pdfIn PDF document text
    • https://at1-turbo-j3t.com/contents/files/9065379778.pdfIn PDF document text
    • http://slmj8.com/data/userfiles/files/megava.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/15730814016.pdfIn PDF document text
    • https://edouardweil.com/userfiles/file/64699633320.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/paxex.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202109111313163390.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/ccd7m8spo13ksnqaunfkthj0ei/zesatuvurupexamarot.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/24724065224.pdfIn PDF document text
    • http://urs-certification.com/gais/image/file/34429992597.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=vidmate+app+new+versionPDF 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_off0000dbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFD 17648 bytes
SHA-256: a4b13748485d794cfd3b1202a3bddd1982c73a24bcbd6fdc59e2092e6238c167

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