Malicious PDF — malware analysis report

Static analysis result for SHA-256 de0db750e896e1fb…

MALICIOUS

PDF

70.3 KB Created: 2021-09-23 11:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 7c39db6bd455cf08e76e6c58b672f91a SHA-1: dd86ff8e1532e2a93111af56e3b2a92bd16417f0 SHA-256: de0db750e896e1fb49aa158777470620546a93969b6fd7246207f57a3d8515e0
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5846

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://irlanc.ru/uplcv?utm_term=wand+emoji+harry+potter PDF link annotation
    • http://aucoindeshalles.fr/menu/file/soxudosu.pdfIn PDF document text
    • https://stoneappeal.in/FCKeditor/file/pokes.pdfIn PDF document text
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/dokusitonoburekapezijal.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/gapoxomimifavunatewagob.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/28164731015.pdfIn PDF document text
    • http://bannails.com/fckeditor_userfiles/file/powapitoja.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/95000215705.pdfIn PDF document text
    • http://cdkuysuujk.handysociality.com/upload/files/sedagezalugerefijele.pdfIn PDF document text
    • https://rwd1.thadv.com/upload/files/zametidiligeruwu.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/83714467100.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/xovasizum.pdfIn PDF document text
    • https://pokereshop.cz/data/file/gisagopuwidasefese.pdfIn PDF document text
    • http://quimis.net/js/ckfinder/userfiles/files/83443051812.pdfIn PDF document text
    • http://urotunisia.com/uploads/FCK_files/file/bofesajofibodugepet.pdfIn PDF document text
    • https://takipbizde.com/calisma2/files/uploads/58530768715.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/37a93665a1cf9e2b3a35c89d38f16a5d/fukomev.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/kifisefi.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f746ee5031---fibasurofajanegika.pdfIn PDF document text
    • http://gpshardorawal.com/hemkunt/userfiles/file/89961285640.pdfIn PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/motabojikofek.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/siduliduw.pdfIn PDF document text
    • https://skl.deindrukdemo.nl/upload/files/10291174885.pdfIn PDF document text
    • http://romangruszecki.com/uploaded/file/fimasojoxariwisizomaso.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/xapatet.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b31b353e66---1093913999.pdfIn PDF document text
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/dabategelabupulifep.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E8 17560 bytes
SHA-256: b1c54b01eec86d9376de7b5bff00d76af73f100bfc5b4b3b8cbf40a2fed98ad2
font_01_sfnt_off000104f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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