Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3ac8f48f761934…

MALICIOUS

PDF

69.2 KB Created: 2021-06-28 18:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 81a2f13f81d3e4ff493afcaef9d592ae SHA-1: 8b7b88daf0f18664ed59405636b52917109da553 SHA-256: fa3ac8f48f761934004898a0b70fbc1be7e4b4f8b3af8e34ab04d6a638391edf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm that directs users to multiple domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic firings clearly point to a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6630

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://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/610ea941e4627bb69d49f1c15b3dbb55/vamijobapuposamawip.pdf In PDF document text
    • http://mateuszkucharski.pl/admin/file/pivotodubogi.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16080f7754b944---risojojafonek.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/69212338618.pdfIn PDF document text
    • http://webinside.pl/userfiles/file/77366417118.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc6c2b4da2---8057278930.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/f95a0868bbfd3f9f81b4169aac76eebd/32968984362.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/70330863948.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/2498620504.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/120214366043.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/omt2foj6gi8q5uubdkonn2bok1/65851554877.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2fe2e2622---36683741511.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/d050e149ff7a255b043e61b72eeec3bf/lepilaxorix.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/ketunomusobo.pdfIn PDF document text
    • http://northcity.rs/slike/files/sutujufikowutizopoza.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/bumamomimof.pdfIn PDF document text
    • http://dzbnf.com/upload/file///dovuxep.pdfIn PDF document text
    • http://lecapsuledigian.it/file/jezesixise.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a140ab61910---pemulagijama.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/479oqlbf6558tti8ctruhcr3bf/11805259115.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160840e85a226b---95925143771.pdfIn PDF document text
    • https://bataretak.com/img/files/file/nopidutebotipesukonu.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a3380f61f21---zipufozafadasabon.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16094a6736cd90---petururapirotobigo.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/zalemixutexojitoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=cambridge+igcse+business+studies+4th+edition+answersPDF 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_off0000e9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E3 16232 bytes
SHA-256: 24a3aa7701c9c62ac6efbc665a22ba7aa7e0b580827dbb75afd876cd0018efc5