Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef169116ed085a0b…

MALICIOUS

PDF

58.6 KB Created: 2021-10-20 03:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 651f8ca96bb57e6fdeab820ad08fb867 SHA-1: 85a8ee9b974440993124dc49d71889c19ab24765 SHA-256: ef169116ed085a0b927fd343b33f4b91099cc7744dae992edf3de1641b655bb3
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and a large number of external links, many of which point to compromised websites or disposable hosting. The ClamAV detection indicates it is a known phishing or trojan variant. The embedded JavaScript and link farm suggest an attempt to redirect the user to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4953

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://philabc.ru/uplcv?utm_term=pirates+of+the+caribbean+4+full+movie+in+hindi+download+720p+khatrimaza PDF link annotation
    • https://sibirprokat.ru/ckfinder/userfiles/files/58864139144.pdfIn PDF document text
    • https://jmbarrenetxea.soinuenea.eus/files/galeria/files/sezufujofufevobaregisi.pdfIn PDF document text
    • https://agrocare.ro/ckfinder/userfiles/files/jopumebagukixijoxuj.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/47540643586.pdfIn PDF document text
    • http://musicfriend.vn/public/default/ckeditor/files/36983145176.pdfIn PDF document text
    • http://studiopetrilli.it/userfiles/files/72059742877.pdfIn PDF document text
    • http://datacomsystems.cz/userfiles/file/bekarolafofe.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1616a6b555cf0a---wesivam.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/85347419015.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/peweniduzedojemu.pdfIn PDF document text
    • https://bengalroys.com/ckfinder/userfiles/files/gabisetelimubudemibedi.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/68pk8035ifd53t0ti5p0bqlqd6/45682884247.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/72120140700.pdfIn PDF document text
    • https://toliveinchristjesus.ceosale.catholic.edu.au/application/third_party/ckfinder/userfiles/files/90239595631.pdfIn PDF document text
    • http://ngocminhcnc.com/demo_thietbimay_24_7/upload/files/55291700158.pdfIn PDF document text
    • http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/82454838964.pdfIn PDF document text
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/92248560499.pdfIn PDF document text
    • http://china-shengbang.com/upload_fck/file/2021-10-1/20211001210820406220.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/41050024315.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/34062020904.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148a83c54d9d---zomapo.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/50989797998.pdfIn PDF document text

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