Malicious PDF — malware analysis report

Static analysis result for SHA-256 284313e4e2854f91…

MALICIOUS

PDF

67.9 KB Created: 2021-09-06 12:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f334dc4aeb6ae52c9f5da1141231c4ea SHA-1: 17e917f9d7cdc293dd55a567abe41918a1a9bc6b SHA-256: 284313e4e2854f911ab191d13ae6ad703be400e8097c82cfd9dd0384f58bf0e2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links pointing to compromised websites, indicating an attempt to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a phishing lure or a distribution point for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6848

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://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/8daccd5b3273c748024136b840caff9d/3626143442.pdf In PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/5a1b1aae3485330047e20ed477f5b604/8408256255.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/96879519682.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160966c432cb83---lekifezuzuvuzetejap.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608707fcb809a---58424912723.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/9edcca8f02753d3907bd47d125bc8bbd/nuwulo.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/lopixo.pdfIn PDF document text
    • http://dotykbylinky.sk/_subory/subory/kipuvuguzifogube.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/3738075382.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/d60c6a680e6f3eb707bf88af4fef53c1/magazomuvewafarate.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/lipijug.pdfIn PDF document text
    • http://korsorlampang.net/user_img/files/nufigipuv.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/7qdrulumilf8obp5aaf8koo4p3/xaxawowigowir.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/83617075983.pdfIn PDF document text
    • http://turbotechnik24.de/userfiles/file/98432422871.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/f488f10e03af0b320acf7c603d09a665/rowavilin.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/88456041915.pdfIn PDF document text
    • http://gunjanjain.com/app/webroot/js/uploads/files/sasawajudejidopozajav.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071db3e1000e---pesotif.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d4492f5942a---gobatewebirazovad.pdfIn PDF document text
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/30101063677.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7e25befe5---dajurezuvugavuzevazuguw.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/9e217f3615dc4cc4d31a30e7a7bd023b/86742600111.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/zegobu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=animals+and+their+young+ones+worksheets+for+grade+2PDF link annotation
    • 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_off0000d592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD592 17396 bytes
SHA-256: 139b5a69f1047c0aa6b09b9f2518087656c7f39323c8acec19b8d7889671f47e