Malicious PDF — malware analysis report

Static analysis result for SHA-256 8208e27ad567b006…

MALICIOUS

PDF

80.0 KB Created: 2021-09-11 14:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ae013f152fceb0d03cbfa47761974176 SHA-1: 7b72799d194d3c4bc7f6e606284cdd09acd33cef SHA-256: 8208e27ad567b006f02e9653726f5f71330867569133900820c43889b5f4cc8b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and a large number of external URIs, indicating it is designed to redirect users to potentially malicious websites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is a link farm on disposable hosting, reinforcing the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3358

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://wastran.ru/uplcv?utm_term=android+giantess+game PDF link annotation
    • http://chineseclothingonline.net/File/mubopeditanegevesagosi.pdfIn PDF document text
    • http://portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/biwemavojemiti.pdfIn PDF document text
    • http://jonme.net/ckupload/files/vujabokamikusuwowotaru.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/wuxunujirelomonivaminatug.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/9248944970.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/gupomowobuj.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/noperufetuvebovuwabof.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/27510761117.pdfIn PDF document text
    • https://ww150001.linebot.net/upfile/files/20210907132529.pdfIn PDF document text
    • http://xfswchem.com/upload/files/34480413510.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/muxotane.pdfIn PDF document text
    • http://dautuck.com/uploads/userfiles/file/79838144214.pdfIn PDF document text
    • http://baschin-heizung.de/meineBilderAlbertGrundschule/file/15634636210.pdfIn PDF document text
    • https://estatecambodia.com/htdocs/cljr/data/files/42863532446.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/10524824151.pdfIn PDF document text
    • http://preiss.at/upload_files/files/zewiwotomun.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613300930d225---12170397010.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/22501915459.pdfIn PDF document text
    • http://ksiclub.org/projects/achievemore/admin/upload/fckImages/file/66376111966.pdfIn PDF document text
    • http://www.mmalappeenranta.com/tiedostot/files/44311028937.pdfIn PDF document text
    • http://net-marketing.hu/images/files/leriwutojawig.pdfIn PDF document text
    • https://nabil-doukali.com/userfiles/file/navufoxudejenovosubo.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/vaxufawozizeveni.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF269 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7A 17976 bytes
SHA-256: 435d07496b405df06b993a11d2ad68344d88b9852adbf0b861f1314bf49c20f3

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