Malicious PDF — malware analysis report

Static analysis result for SHA-256 eedb8f5b2950e23b…

MALICIOUS

PDF

79.7 KB Created: 2021-06-30 23:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0ed01d0d6523cf1d88ee6369f30a11fc SHA-1: 29501aa44a484aabf9887d6375650a7926acbf35 SHA-256: eedb8f5b2950e23b2c0882f3958618b832a997e7c26db43797b1ba34c49f2bd9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting it is used for phishing or malware distribution. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5984

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://nomylo.ru/uplcv?utm_term=how+to+get+a+king+size+bed+through+a+door PDF link annotation
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/2b3d45690f11e8f94c4fd7b4559b8b25/zaxobolegupafogitukuz.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/e5c282304b732630491fa05de78660e9/welewamene.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/47765277238.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b35cecdce1f---zifugujijisegosebowotavej.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb1573e043---34208253961.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b42e2e1897---zuzuvi.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840ab83ad14---43030848121.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/671d1d41018c400d2a13179cb97963a8/nojibuxunosoj.pdfIn PDF document text
    • http://ohsclassof73.com/clients/9/9a/9a21b0b253f7c4eafe662346d237c286/File/19249782319.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/jozaf.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/66335140746.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cfec2d6656b---63620582586.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f2389151a---88191534859.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160827f4742734---2576229725.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/46239222189.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada7cfaae5a---rapedobobazalu.pdfIn PDF document text
    • http://jarosi.hu/files/file/65385863245.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/32140923466.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd1a86de4f---natumurux.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846144eee6b---nixolubiwanuzifikeratuwit.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/782c78df0354cead871c6a421ce2c7c2/nolokopolate.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5fb886be8---82901676856.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16084b448ccf7a---pipederunekixajira.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ce1d018e1bc---xejif.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_off0000fc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC67 17180 bytes
SHA-256: e5573a285a77ad07a69eeb74f1691f7d691d3c3436aaa0e1d9ab5b105a572f2a
font_01_sfnt_off00012977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12977 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1