Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb56219bb8d4cf10…

MALICIOUS

PDF

62.1 KB Created: 2021-09-20 04:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1602a9c56560e9e1f8bd262e7337eeda SHA-1: c611c2e5641ffa5bd9774d7fc3aec810b3df7d84 SHA-256: eb56219bb8d4cf10daf19c9f61245a4e58f53fc77f9badc737b4608cba1aa7b0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged by heuristics as a link farm on disposable hosting, indicating a phishing or SEO manipulation attempt. ClamAV detection and ML classification confirm its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's part of a campaign to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8343

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 http://fukaofoods.tw/uploads/files/202109020822375605.pdf In PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/juzekusek.pdfIn PDF document text
    • http://dichvutot99.com/webroot/img/files/61496848772.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/57281425658.pdfIn PDF document text
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/18145073712.pdfIn PDF document text
    • http://seychelles-resort.com/images/blog/file/50681493194.pdfIn PDF document text
    • http://cjpharmtech.com/upload/files/dutuzosepunivijufalifalel.pdfIn PDF document text
    • http://ozgu-yapi.com/firma/files/zakaxil.pdfIn PDF document text
    • http://senvietsystem.com/ckeditor/upload/files/zigewifewexivozigeke.pdfIn PDF document text
    • http://pk-rowery.pl/user_pict/file/jolizul.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/29193398553.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/72201167705.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/2814182732.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/zipawajirapakiwajesimi.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/47015522337.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/rukagoxuposivoretug.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/nuwotesofuxuja.pdfIn PDF document text
    • https://campermagazine.tv/public/file/bupefajigulure.pdfIn PDF document text
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/lusubupesikajogivegel.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/madukiwomo.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/korukoxid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=volume+control+widget+apkPDF 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_off0000e189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE189 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1