Malicious PDF — malware analysis report

Static analysis result for SHA-256 6896b2f2d97904ef…

MALICIOUS

PDF

74.9 KB Created: 2021-09-05 02:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 66daaa293251b082972f574571a2f86e SHA-1: ec6499c8024fe3809595629fd5b5e794ed4f6f23 SHA-256: 6896b2f2d97904ef7063e7345f234ca2de25a4e47b91828b455ee9565b55c357
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links pointing to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to lure users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file's structure and the presence of multiple external links suggest it is used to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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
  • 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.
  • 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://smidgel.ru/uplcv?utm_term=double+moiti%C3%A9+triple+tiers+quadruple+quart+exercices+cm1+pdf PDF link annotation
    • http://saokienviet.com/uploads/image/files/23927700668.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/zuroga.pdfIn PDF document text
    • https://maisonforville.be/documents/file/gegebet.pdfIn PDF document text
    • https://onecre.com/images/content/files/diguwatavawaxe.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9cf708a8e---miritidarupakuwigipi.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/hap59kncfaokmfl2o2egl50lfo/63658785379.pdfIn PDF document text
    • http://whalesart.com/uploadfile/file///2021061003191783.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/17620579685.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/fezanediravewoduxi.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/taboforu.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e7764fad5---muvilulamuvokuwada.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872d9b911a1---dujakaxewajefarirud.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/vuzibaw.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/28449639159.pdfIn PDF document text
    • https://juraganmonyet.com/contents/files/24594738786.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071c7ea3336a---gikowigikubija.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/tobarolilu.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/42557503024.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084e6c51b07b---52085243071.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/kinenegarako.pdfIn PDF document text
    • https://go2germany.ru/files/file/fufifolarap.pdfIn PDF document text
    • https://wfbulgaria.com/uploads/wysiwyg/files/35053292126.pdfIn PDF document text
    • http://www.heksan.com.pl/file/70522746665.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3244c415c---dagojarijuzetisi.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_off0000ceea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEEA 18800 bytes
SHA-256: d687712e22943f40cb648c9ede8eb32415f9eb96d21f114f99c6e12bed363396
font_01_sfnt_off0000fef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF5 11372 bytes
SHA-256: 73bbad114064bd30b098faadf243e5bd6e9b5cc01f224e376d68c793437fe3dc

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