Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa5b52ae87a7c1e…

MALICIOUS

PDF

76.0 KB Created: 2021-09-05 19:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 046af524882c0a4d8846025207d8c57c SHA-1: 7f3ee5c0b0a761eeba12fe379e155eabbd9155c9 SHA-256: 6fa5b52ae87a7c1e2d4ca6e2c4da34b6bdc38ab4fac213ab0eec25bfc859f2d0
162 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The primary goal appears to be directing users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6592

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 https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160954d2d19373---vaxabos.pdf In PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b1285d9b847---5470739291.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/76091382486.pdfIn PDF document text
    • http://www.heksan.com.pl/file/99899747691.pdfIn PDF document text
    • https://airbays.com/userfiles/file/84621444734.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/widibifisebesazoja.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/razavasukexuwamuwipo.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104d4a0e16ed---fodivirilasob.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/zixiraxa.pdfIn PDF document text
    • http://scottsdalehighbeavers1978.com/clients/80197/File/mupujesagizatanedawi.pdfIn PDF document text
    • http://07-3739589.com/CKEdit/upload/files/52029145299.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729d9ec989e---39381645916.pdfIn PDF document text
    • https://candica.pl/ckfinder/userfiles/files/degigo.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be666b037ee---64440931916.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ee7acdb22a4---medoraxeranafonajeza.pdfIn PDF document text
    • http://ypperfect.com/ckfinder/userfiles/files/zerosuwufiwujenunutep.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/52220865698.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/57356137008.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd5d2bd611---75112301974.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/d32b874ae78eab957e828b28028accac/74251364905.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/xagagivipi.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/sikudov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=double+fertilization+and+triple+fusion+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_off0000e77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77B 18976 bytes
SHA-256: 3237373155cd3ac7d31a9eb8ece51695ccf95cbe7dfd5da5de4390af601b1d00
font_01_sfnt_off0001186b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186B 10792 bytes
SHA-256: 6e28534153d5b32d0e364010c1ef016d0b384b0e52636a653c8ae153b4dbfe57

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