Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7ab48bd86b6ce3…

MALICIOUS

PDF

73.4 KB Created: 2021-07-01 14:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c51fd67f00ce0b335ac7b223b48b3e54 SHA-1: 9394dd0c71e8eee2e73895c70ffb9f234d973c80 SHA-256: 6c7ab48bd86b6ce3372e3105025a2ea14c5574f7067f5e36cfa3f8bf8aba44f3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm with numerous URLs pointing to compromised websites and disposable hosting, indicative of a phishing or malware distribution scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4659

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://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/c032c455618d34e68c30435658eaea4d/kototolavuxena.pdf In PDF document text
    • https://bcbc3399.com/upload/files/9636783620.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/9ee3d471883cda1a076dd5fb5ac5c6ff/zelurutadabegironu.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d4d57deb6---benimufevofi.pdfIn PDF document text
    • http://southport1969.com/clients/861680/File/95491153539.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/64853919048.pdfIn PDF document text
    • http://skncn.com/u/files/77083675204.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/17cee78a24282fd7c51208ddd0434c36/vufovanuwuzadigi.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608918ad64b0b---64630417288.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/ramutefufewuv.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/97050614423.pdfIn PDF document text
    • http://swiss-ex.com/zokibexevupaduzi.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/65185177164.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hv15tp8ghnde6ukquljbj8m8a4/wolugepunexoweduvuwozi.pdfIn PDF document text
    • http://sinhorelli.com/userfiles/file/zalezojowawimibatidapigo.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/18143078591.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160811dc1a229d---lixorapo.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160afefb04bd20---fevozudatigum.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/surogida.pdfIn PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/15993667157.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/38429299063.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ee73v2nuckmm1e089at5qhfl8q/bolaralu.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/8700788418.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/1541802971.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/1677921471.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/77447661714.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/mabubitajewan.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070cc8f8aa0d---26023153653.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=information+technology+code+402+sample+papers+class+10+with+solutions+2021PDF 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_off0000f213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF213 19232 bytes
SHA-256: c5d3852a2dde7cf70336e839e6ed033e5f3dae0e37f26e3958df9bea144fedd9