Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a48185482f0f34…

MALICIOUS

PDF

65.1 KB Created: 2021-09-17 15:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b988ff3105f7323be97481bfb7eac747 SHA-1: 0402976920c7f0b32a5b2063cfd091b6da11871c SHA-256: 27a48185482f0f34d9413e8b8c1907108ddbc71c7407c7e3ff3a83895581380a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5438

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://wastran.ru/uplcv?utm_term=persuasive+text+features PDF link annotation
    • https://linardi.ru/files/file/97026657980.pdfIn PDF document text
    • http://avrig35.ro/uploads/fck_editor/file/20654807928.pdfIn PDF document text
    • https://nabil-doukali.com/userfiles/file/navufoxudejenovosubo.pdfIn PDF document text
    • http://www.smartusb.info/images/library/File/xazekepakugufalome.pdfIn PDF document text
    • http://sieuthimaynhapkhau.com/upload/files/gemejakagatosiliduwes.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/xegatipewo.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/neritovukotawefipuroja.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/89683990699.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/45188920992.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/sujuzopotigu.pdfIn PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/79472808675.pdfIn PDF document text
    • https://gplacestracker.com/userfiles/file/niviwixi.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/76199168827.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/mexikokijowatamu.pdfIn PDF document text
    • https://avukatwebsitesi.kocgrafik.net/upload/files/kenamenadoko.pdfIn PDF document text
    • http://vxclouds.com/userfiles/file/55700580594.pdfIn PDF document text
    • https://avphunter.ro/ckfinder/userfiles/files/tunefazivavigobi.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/loferurofapot.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/20028828277.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/tojevabufurekam.pdfIn PDF document text
    • http://esistore.de/userfiles/file/xinazasigejawikupokito.pdfIn PDF document text
    • https://karlschool.org/uploads/files/202109040956498907.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/78451655353.pdfIn PDF document text
    • http://islenapuntos.com/campannas/file/nupukebepedanazasowexe.pdfIn PDF document text
    • https://on-call-anatomist.org/ckfinder/userfiles/files/lixarusixubesoziwunuxas.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/161440a3f17b6e---38705081684.pdfIn PDF document text
    • http://corising.info/sa_upload/userfiles/file/20210906140305.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_off0000ea4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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