Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b72462c920392b5…

MALICIOUS

PDF

60.5 KB Created: 2021-04-18 11:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f08836bdf3f72358d5abe92ffd4ee9a SHA-1: 5563e18c428684d45ac2ca4754bb309b8cde0baf SHA-256: 9b72462c920392b514e2df0ac792d371c5ddbd61e60d3a683336d0d723e5c14d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, likely leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6759

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.pharoxglobal.com/sites/default/files/webform/80628544521.pdf
    • https://www.termis.org/system/files/webform/vomijalikuwukilowerosi.pdf
    • http://www.muttypawsacademy.com/sites/default/files/webform/vaccines/nojezajewi.pdf
    • https://www.jwico.com/sites/default/files/webform/monufugabezexi.pdf
    • https://extranet.blanchisserie-toulousaine-de-sante.com/sites/extranet.blanchisserie-toulousaine-de-sante.com/files/documents/justificatifs/ratasivovo.pdf
    • https://www.uts.cw/sites/default/files/webform/96040264728.pdf
    • http://www.muttypawsacademy.com/sites/default/files/webform/vaccines/lomaxitafuvutatu.pdf
    • https://www.ofalloncasting.com/sites/default/files/webform/geguridafaj.pdf
    • https://vectorcorp.net/sites/default/files/webform/resume/dofivefodazewinewes.pdf
    • http://pilgrimland.com/sites/default/files/webform/resume-uploads/69774832497.pdf
    • http://portal-mysigma.com/system/files/student-proof/41429692510.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=propiedades+opticas+de+los+materiales+ceramicos
    • https://drones.princeton.edu/system/files/webform/61493424170.pdf
    • https://ec.europa.eu/eip/agriculture/sites/default/files/webform/vojevo.pdf
    • https://www.healthdata.org/sites/default/files/resumes/mevupuxapiledowitire.pdf
    • https://campusrec.princeton.edu/system/files/webform/jelozubunumi.pdf

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