Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e6d8202e1ceeeb7…

MALICIOUS

PDF

90.4 KB Created: 2021-07-19 22:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9131f9ae047129176ad82771cf453fe2 SHA-1: fb3f71d9aeb463de98beae7150adbdcb2e6347df SHA-256: 4e6d8202e1ceeeb703447d439b279a305ab68921b6548d44ff2b4b799286b6f6
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document exhibits multiple indicators of malicious intent, including being flagged by ClamAV as Pdf.Phishing.Trojan and heuristics indicating it is a lure for MFA or browser extension installation. The document body is heavily obfuscated, but the presence of numerous external links, some hosted on compromised CMS uploads, suggests a phishing or credential harvesting operation. The primary attack vector appears to be social engineering, directing users to install malicious software or divulge sensitive authentication information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.sec-ollivier-associes.fr/www/upload/file/fuwaxinikofetenebeje.pdf In PDF document text
    • https://zoldlepes.hu/userfiles/file/sazopaziwob.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16098442fe9eae---dekadunikovigaxofadipaw.pdfIn PDF document text
    • http://rogo-rotterdam.nl/files/23295302190.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/ed6fi2s8jg7cuab1mr6gmlcir5/46436240547.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/texireduged.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/korixebitaka.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/nifovezizoderolagav.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082432a2157e---591375632.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add003d7b2a---99934449262.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/1ns5pqntdvvflueo4dk1qoap2h/38544796952.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/xesezazozuvasutifen.pdfIn PDF document text
    • http://annandale1963.com/clients/69704/File/vofod.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/o0kskj8qks0mct81j7nqpua4i6/953172626.pdfIn PDF document text
    • http://franklinbristerharveyfamily.com/clients/a/a8/a8910385c57dfddac3c6311e2bd1422e/File/xulobuvit.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b916f59a422---jenivetomafe.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/47753061142.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/66bee88bcb10c1f91176b6f523f1c3e4/golifur.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/xejujuge.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/baloginudijalelitawolos.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d11db6d75---tipulesal.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/senijepobowazalikuvarugus.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/kesofuzosumonewi.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c70dbc7cb0a---86819264876.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160738a804a695---90809742571.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/0271f9749011e120ee79e1ac02301880/29868786174.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+to+copy+sign+from+pdf+filePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F0 10992 bytes
SHA-256: 14220e34f6ef1ef3e7abacb3288b175cb2bfa73fd9140a7e7ca793f09ccd0a0d
font_01_sfnt_off00011348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11348 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5A 18252 bytes
SHA-256: 5870ba74f78a171cc51e52567f503ff71ddc422834fc2e5b641654f232299ced

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