Malicious PDF — malware analysis report

Static analysis result for SHA-256 a25806eebe2269e0…

MALICIOUS

PDF

41.8 KB Created: 2021-09-27 01:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8b87ac185b2b539de75ba4a811adbc5e SHA-1: 295bce35e93a3f7795c2ad2f35565e54638aaa39 SHA-256: a25806eebe2269e068ba3dc7da28468a3a30f2930c503488568e6430b4c41b90
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, including being image-only with a click-outward action to a suspicious URL. The embedded JavaScript stream and numerous external URIs suggest an attempt to redirect the user to a malicious site or download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6964

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://drafthe.ru/uplcv?utm_term=nt+police+salary PDF link annotation
    • http://hulstcustoms.ru/uploads/files/wodijemari.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/worodonuzudazubo.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles/file/gojogomosixepi.pdfIn PDF document text
    • http://www.hro.ait.ac.th/js/ckfinder/userfiles/files/61021374397.pdfIn PDF document text
    • http://skinct.com/upload_file/file/Fl202109100944162477.pdfIn PDF document text
    • http://yoshitomo-kokubunji.com/jcfiles/file/90342931483.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/56745230257.pdfIn PDF document text
    • http://hiddengemsbookstore.com/userfiles/file/89189415790.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-9-10/20210910174354444530.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/87707260032.pdfIn PDF document text
    • http://festacreativita.org/userfiles/file/7780543701.pdfIn PDF document text
    • https://pensiuneaselina.ro/userfiles/file/sopuwuzil.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/farupuresaleruwasubon.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/61462106440.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/wenitasazosidaluj.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/9088121236.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///61544352768.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2cf928636---sowuvixuwiganixipeboxada.pdfIn PDF document text
    • http://divodizain.ru/ckfinder/userfiles/files/51143151597.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/90066366216.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/77507058363.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615098b87813c---gisesirolozazu.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/malozevolokigulamawunadoz.pdfIn PDF document text
    • http://www.astmalek.cz/obrazky/file/89922676048.pdfIn PDF document text

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