Malicious PDF — malware analysis report

Static analysis result for SHA-256 47de3ae9516fe0d1…

MALICIOUS

PDF

60.8 KB Created: 2021-09-25 15:11:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2f5196c5c3ea739b631588f216363b9d SHA-1: 556becf473640688f629cd8a6e17ef4f3077c78c SHA-256: 47de3ae9516fe0d130cd9ca53a3b41469ddcab0b831cb359e50983b792d58d2f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains an embedded JavaScript stream and a link farm pointing to multiple external URLs, some hosted on compromised CMS uploads. The primary purpose appears to be redirecting users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7635

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://inwebjor.ru/uplcv?utm_term=what+is+the+best+way+to+get+string+in+minecraft PDF link annotation
    • https://uudanbury.life/files/file/68901137935.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161497c4287536---70121413981.pdfIn PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/45935575740.pdfIn PDF document text
    • http://tg-focus.ru/userfiles/files/49094775169.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/6ad96acc4d1562f2132b6b9de1c75579/suxakazamupipiletutuzer.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/56392415205.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1ad3dde14---89416970879.pdfIn PDF document text
    • http://ecosdaliberdade.com/ckfinder/userfiles/files/38812206767.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/jubenuseb.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614330b62a295---balilawaxibofegetaliwok.pdfIn PDF document text
    • http://quatangsongvan.com/hinhanh_fckeditor/file/vufiguwutomojug.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/0789b241d25e423b0a6eee9e2f466ae5/63108199007.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/77273347914.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/dobobi.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/megagu.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/66030135039.pdfIn PDF document text
    • https://airbays.com/userfiles/file/xafamirotatujikej.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/silatavije.pdfIn PDF document text
    • http://investbuild.ru/var/upload/file/93292967945.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/zorivubatisimupuxojib.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/kiwowiwotuguwulatuxiv.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/gigimokoxuliwele.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_off0000b1cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1CD 15804 bytes
SHA-256: 299884186b40a15365fc4214c3ded670c9f985d046f392e9e499a2950a808ac6
font_01_sfnt_off0000da07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA07 11068 bytes
SHA-256: b2114d527412330cfa91af3c5a0af4743bfc8806d9dd0f928d02245a978421c9

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