Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c72c8f6f408fd5…

MALICIOUS

PDF

64.9 KB Created: 2021-09-05 12:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7bb337046fa9c1ed15d673465a49ad03 SHA-1: 710834e5f84c1f89bbd8e5e03e699d19c8bfb452 SHA-256: 29c72c8f6f408fd5663c8032265da1a935f5f433254ddebbc4ad945e04327247
154 Risk Score

Malware Insights

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

This PDF was identified as malicious by ClamAV and an ML classifier, indicating it likely contains malicious content. The heuristics reveal it functions as a link farm, directing users to numerous external URLs hosted on compromised or disposable domains. These links are likely used for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5479

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://ketchas.ru/uplcv?utm_term=history+of+bretton+woods+system+pdf PDF link annotation
    • http://www.oomewatersport.nl/upload/files/junogobege.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/16754029611.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/030379fdd6c4dc30e8369fdc3b91e718/45178569050.pdfIn PDF document text
    • http://reinforcingourheritage.com/clients/0/08/0860c2a235168fe7e4a745c824023bdd/File/61346025785.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/34119315212.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a46d428ba5---39430146000.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afb6e5d8d1d---rixinexibujudelox.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/0bc8ea07464f00fd8916168af8688408/xegeruxivosafolex.pdfIn PDF document text
    • http://shopexpert.com/app/webroot/files/userfiles/files/83687764702.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/c0707252ea86b4c364e0f5af80abe203/81310353290.pdfIn PDF document text
    • http://dashoernerboot.de/userfiles/rumizufifapijurak.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e65d7461d73---95883528012.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/8e9dc13c65674652f99dbb5542b49109/93621012837.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/resenutafuvefabajusuma.pdfIn PDF document text
    • https://mrdak.cc/uploadfile/files/tazinagujufusokabe.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/34891222557.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/sepazevu.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/0cq0hbt89qfml0p5g1052kbkq1/nepukawipokejupipefuwi.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user//file/_0123287001629794632.pdfIn PDF document text
    • http://sdds.be/userfiles/file/12115220890.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba352612968---numazoxamur.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1607b280546445---51859123796.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/60993149906.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/zadiwalofojobuzudujuvafaz.pdfIn PDF document text
    • http://imbirimbir.ru/files/74936677580.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33337382996.pdfIn PDF document text
    • 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_off0000e9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A1 10780 bytes
SHA-256: d8ab325c791ee8e7e3923ee254cdf5d1ba7eaa488f57790aabf82f529f6e24c1