Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e4e97c1af26b9f…

MALICIOUS

PDF

50.6 KB Created: 2021-04-11 17:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41140e3a80d2ff48bed4cf2c765777de SHA-1: 0bf8bb8294abd7267d578e09f1058be1fb887a6d SHA-256: 59e4e97c1af26b9f5ec8b635510dcc1464f336d2c78342867434e98cb3f53027
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which are hosted on potentially disposable domains, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like PDF_SEO_DISPOSABLE_LINK_FARM further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7183

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.a1touchsolution.nl/sites/default/files/wozupidojenebimovom.pdf
    • https://www.a1touchsolution.nl/sites/default/files/26511902049.pdf
    • http://klm3fg.grhosting.cz/sites/default/files/webform/files/5308316073.pdf
    • https://ambrose.edu/sites/default/files/webform/48232920683.pdf
    • https://www.termis.org/system/files/webform/vomijalikuwukilowerosi.pdf
    • https://www.cdcplumbing.com/sites/default/files/webform/contact-us/65589142167.pdf
    • https://www.mothercare.ro/sites/default/files/webform/resumes/susumijifiwef.pdf
    • https://vectorcorp.net/sites/default/files/webform/resume/27999686052.pdf
    • https://www.dgs-interparts.be/sites/default/files/57515461030.pdf
    • http://oaklandchildcare.org/sites/default/files/webform/subeditanutojodojewogize.pdf
    • http://www.friendlycc.com/sites/default/files/webform/47778491084.pdf
    • https://ambrose.edu/sites/default/files/webform/lajeriz.pdf
    • https://extranet.blanchisserie-toulousaine-de-sante.com/sites/extranet.blanchisserie-toulousaine-de-sante.com/files/documents/justificatifs/niroxopewesanusogub.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=guide+for+dream+league+soccer
    • https://ec.europa.eu/eip/agriculture/sites/default/files/webform/9071701793.pdf
    • https://minorsoncampus.princeton.edu/system/files/webform/wetesagepe.pdf
    • https://minorsoncampus.princeton.edu/system/files/webform/jawugu.pdf

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