Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6960e76071b7352…

MALICIOUS

PDF

70.3 KB Created: 2021-10-09 02:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: da3d87ba0d215676d0275c93b68d89f8 SHA-1: a832bbe438747022aeb4a007b92fb3bada010764 SHA-256: f6960e76071b73527d7ca5bceaab4521cdb5904cb0e7766f15255409310cde7b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded links, many of which point to disposable hosting and are structured as link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8434

Heuristics 4

  • 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.
  • 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://synerhu.ru/uplcv?utm_term=orange+peel+in+old+fashioned PDF link annotation
    • http://www.yeosung21.or.kr/ckfinder/userfiles/files/1630654200.pdfIn PDF document text
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/kawaxavewozupuwusezaseg.pdfIn PDF document text
    • https://ajambary.com/userfiles/file/19405432928.pdfIn PDF document text
    • http://shijijiaming.cn/filespath/files/20210904215412.pdfIn PDF document text
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/foxevofisokobexoselata.pdfIn PDF document text
    • http://iltorg.ru/upload/file/bizisixorotejakekulewuja.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/97173966274.pdfIn PDF document text
    • http://edu-soft.ru/site/htmlimages/file/bojozixugawupuk.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/20927843631.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/69274393685.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/9644532868.pdfIn PDF document text
    • https://aksusu.com/upload/files/15739502619.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/38944287743.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/orenixibotopiserabanepum.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/zaguxe.pdfIn PDF document text
    • https://hotnews.md/upload/userfiles/files/8556049902.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/cjqcsun90tmqp618gdtalf0sr2/kiwivaxovosidizog.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210918_6983CF143E5FDCFC.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16155fb892aa73---zazon.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/demuv.pdfIn PDF document text
    • https://copyjokertw.aw6.tw/uploadfile/qu4_qu106_com/files/25502507169.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/13909254496.pdfIn PDF document text
    • http://diadiemvui.com/upload/files/xozinunopepoxujeriw.pdfIn PDF document text
    • http://kasand.com/userfiles/kozabasumokewux.pdfIn PDF document text
    • http://ng-sons.com/userfiles/file/xulizekug.pdfIn PDF document text
    • http://ajitcoatings.com/uploads/juxolekuwofel.pdfIn PDF document text
    • 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_off0000e1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B9 10704 bytes
SHA-256: 9e00e45e0ec1a93dab7ad0b60e33317ac184ca05a65af09dce9a00cc55e6762a

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