Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d195bea8dc43f0f…

MALICIOUS

PDF

44.3 KB Created: 2021-09-29 06:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c8976bfef5466cc993b52ff4b9359b05 SHA-1: 878bb0f217fba6a76699f481e0be2beff90834af SHA-256: 4d195bea8dc43f0f73fa3149b4a5a39409f8a2fceffb48a451db6a44c5e8a25c
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The presence of numerous external URIs, many pointing to disposable domains and structured as link farms, strongly suggests a phishing or malware distribution campaign. The ClamAV detection and ML classifier further support its malicious nature, indicating it likely attempts to trick users into visiting malicious sites or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6779

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
  • 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 http://ctmmaximoravenna.com/ckfinder/userfiles/files/rurejisizuwixawugovalezob.pdf In PDF document text
    • https://austdoorcaocap.com/upload/files/jufojegarosemop.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/newuratotafelekekikawibup.pdfIn PDF document text
    • https://laatuwhuisweerstralen.nl/upload/file/36886910285.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/papitaziwemipulajoxamupa.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/73197307016.pdfIn PDF document text
    • https://copyjokertw.aw6.tw/uploadfile/qu4_qu106_com/files/89037398574.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/geninakaperaredozes.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/23993681555.pdfIn PDF document text
    • http://inbond-cn.com/userfiles/file/zufemibesomoserot.pdfIn PDF document text
    • https://venusnvs.com/userfiles/file/97636791653.pdfIn PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/jomuforejozaxagulokam.pdfIn PDF document text
    • https://dascalita.ro/app/webroot/files/userfiles/files/kejipivedamawi.pdfIn PDF document text
    • https://keongracun.org/contents/files/80557538082.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/2rsu3foq3mdo60fer2sp8emgc7/94819041194.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/gebegolemopizemusep.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/dejazevazukarolovire.pdfIn PDF document text
    • https://pcetravel.com/files/file/47401332860.pdfIn PDF document text
    • https://huangs.tw/uploads/files/202109021019331138.pdfIn PDF document text
    • https://congnghiepxd204.vn/upload/files/37652554136.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/refizokiz.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/lewuzipelagozifisup.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/87656083943.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=best+free+decibel+meter+app+androidPDF link annotation