Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ba01567daf19f6…

MALICIOUS

PDF

74.8 KB Created: 2021-09-02 11:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9cd98efb11da77f8167aefe57b126261 SHA-1: 821f1067b62a1c26d029fbe862d63f6961da386f SHA-256: b0ba01567daf19f6e3c275c5fd0bd947ebcd9c31becb9f431ecc69d8f086be3f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple disposable hosting sites, indicating an attempt to obscure the ultimate destination and evade detection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8582

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 http://bonsite.nl/phpcmsys/file/14330318153.pdf In PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/d78a8d6108418ecc936398ffd3b44a38/79114382826.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1630549099.pdfIn PDF document text
    • http://factory-01.com/js/upload/files/jupabovojik.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce82ac52f2---99699400364.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/23494887258.pdfIn PDF document text
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/65862839621.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607935757d8ad---90018636270.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/jinif.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/wutubox.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/bb4143ac4d623312d4f6de446261f0aa/73087581637.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/61191005316.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/c7ea900c92495c1f34c7f08da73aef88/91107101215.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/ca6f8570b1cba50012ef1e4819a8955e/7371508618.pdfIn PDF document text
    • https://equinox-e.com/upload/UserFiles/file/renukusinag.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ac9869115b9---3670970250.pdfIn PDF document text
    • http://crediramasrl.it/public/file/40763946796.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/bumonan.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/f2s4h2llogq3i41t05l4bdat44/21057704593.pdfIn PDF document text
    • https://dla-pracownika.pl/pliki_user/File/rerujilunokipopezeg.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f2c63052c---geberabekawetamatudo.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/wivuvawejuxekaranatalibe.pdfIn PDF document text
    • http://www.alrafeef.com/faisaliya/js/ckfinder/userfiles/files/jopatal.pdfIn PDF document text
    • http://hanarotalk.com/userfiles/file///turofumexoragoxekibivukiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=narnia+1+pdf+espa%C3%B1olPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27A 10628 bytes
SHA-256: 66f8c5dfc20bcf549fc9782446a26f40b82a0ea8ead830426ad69857739fbbef
font_01_sfnt_off0000ea9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B0 18360 bytes
SHA-256: c26a80152e09560effad76db94bdf763c6b7e6cb5fb1ceeb3ed4b6fba1250406