Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b2c30c34ad913e…

MALICIOUS

PDF

76.2 KB Created: 2021-08-15 18:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 38088592fb1cd101b3eb721c1003c73b SHA-1: 80ea8c0141b7f1e3141e92996acbc036ca8e6a71 SHA-256: 40b2c30c34ad913eed1fd37c1d73eeba5e8e885d52bd598d5c788bce2dbaf670
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely serves as a phishing or malware distribution lure. The file functions as a link farm, containing numerous URLs pointing to websites, some of which are hosted on compromised WordPress upload directories. The presence of these links suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5355

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://codecs.ro/images/file/15180056615.pdf In PDF document text
    • https://aimhc.com/userfiles/file/pufebepolikej.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a68c137b820---39298773463.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1235980e3---42106828565.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16084407a2f062---71080102774.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/6227317632.pdfIn PDF document text
    • http://axwelindia.com/uploads/xoxulepofapefavirexuzezod.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3c3c0bb32---seboduwasawusezokapiw.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/h97tuk608gjcsajkib811ncm5d/jobiramesumagofonopu.pdfIn PDF document text
    • http://klinok-saintp.ru/files/37917758034.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/k1oqum41rn6545b1vk14rhgci7/90397211960.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/reo0d0ah4pebmuhdf9miee6c64/39961740414.pdfIn PDF document text
    • http://www.saito-ken.jp/userdata/file/94550349033.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210810_4FB8D05492790756.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/80251721123.pdfIn PDF document text
    • https://senfina.top/uploads/files/piserizubejaxenijox.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/b3753212f98174431e1e358ca6324369/xurinekagawomufej.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca6df5fdac---36265008186.pdfIn PDF document text
    • http://locthanhwindow.com/img_duhoc/files/46007337266.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/25123055205.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/75315964620.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/614fefe33f9617d5d21e14717c5b5486/depogizuw.pdfIn PDF document text
    • http://fteq.ru/files/file/pewuguzirelawa.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/zipopowivo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=the+developing+person+through+the+lifespan+free+pdfPDF link annotation
    • 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_off0000e120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE120 10904 bytes
SHA-256: 701e48d1fe58610ddd84fb7b7b4e245107f37f472f4efcb4fa4c75ee39d69ca2
font_01_sfnt_off0000fa1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1