Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0915561e70a1e90…

MALICIOUS

PDF

48.0 KB Created: 2021-09-19 07:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 75bd3f2b235f7c42f36d3105e8042f8b SHA-1: 4ffdbc3e266985065e42452238bf876b7e4aee83 SHA-256: c0915561e70a1e9008831f3db2c1ac7003f4e0cd6f46e872004d41ac4fda8e5b
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites, potentially exploiting PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8005

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://wastran.ru/uplcv?utm_term=bakugan+ds+rom PDF link annotation
    • http://odumakus.com/uploads/files/dewepaxiko.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/96760812308.pdfIn PDF document text
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/74839513049.pdfIn PDF document text
    • http://duplisite.com/userfiles/file/51256436534.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/74609237717.pdfIn PDF document text
    • https://demo.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/wuxifajovipamuvimi.pdfIn PDF document text
    • http://methese.com/upload/files/8267553050.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/40209177545.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/30785778711.pdfIn PDF document text
    • http://homokkepek.hu/editor_up/22340369206.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161327295baea9---lugukofadutadumexavafale.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/33198225419.pdfIn PDF document text
    • https://agape4u.org/userfiles/file/50651255022.pdfIn PDF document text
    • https://treasurehunterdetectors.solar-ovens.net/ckfinder/userfiles/files/60254763136.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/tifiwi.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/30a07e92df14a5881395ccc79e79f793/29831312905.pdfIn PDF document text
    • http://asu78.ru/userfiles/file/14053854859.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/foxeteravedalawu.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/16112708231.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/6rdgoit5jnlmfjrqcov00dhd06/97766812076.pdfIn PDF document text
    • http://hidropro.hu/upload/47566347270.pdfIn PDF document text
    • http://yizhu580.com/ckfinder/userfiles/files/554147200.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/baccd263fc90b7dd1fa987a987f21ca4/85379536620.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613eccd0ea7c4---91425371349.pdfIn PDF document text

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