Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b028ac192789b81…

MALICIOUS

PDF

92.5 KB Created: 2021-07-02 02:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ac838fc50acd7d9ac67b5c85327315b SHA-1: bfa8d087e19ca6d126da0f3c1f539ff2df710893 SHA-256: 9b028ac192789b81dec1c48e7e2352c742e93a1c2ad138a7dc11140551fc993b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • 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 https://nomylo.ru/uplcv?utm_term=best+action+game+in+the+world
    • https://menu2uplus.com/images/file/madukunugopizogus.pdf
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/82269333036.pdf
    • http://texmet.pl/userimages/file/nibureferutovufarugunutal.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832e67486c0---39325869517.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a811a08eaa---59437836814.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/995d1cfd923497f262256cbfc681ddf3/3145763165.pdf
    • http://www.tomasjelinek.com/img/pub/file/xadovodutedeb.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/21f0f3b8c0a779c5506d86ec0c5a8270/35645417711.pdf
    • https://wsbtitan.com/images/file/dovesajakenamera.pdf
    • http://asustainable.com/global/file/34880900479.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/dfc10338a6a74939b78cfdb2d47ab636/33033795063.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/iamp5kjngq1hkskiu3p7dm3cri/donizowuxoti.pdf
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/72170372316.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f19cc082a8---bokawiwexedulamominebubid.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d56838ed44---vulosur.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088449c9c7c3---zerisigenetomisoze.pdf
    • http://bobas24.pl/Upload/file/81607100331.pdf
    • http://vasvaripalmuzeum.hu/upload/file/rekulesipifu.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bed22d185a7---13779162364.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160713c208e17c---40256176773.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/9qhvtonh06qdl01ps165ua06t1/48441970279.pdf
    • https://bisnismedsos.com/userfiles/file/kejivobebozeji.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e5e547114---wudewubuz.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/30850791d6d3ff36ed128989feff2d9d/bimelokifiduzun.pdf
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd71a4dcbf---runurizopevo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104c7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104C7 16792 bytes
font_01_sfnt_off00011cde.bin
7fc91a1e11dd1adf2f6c50db4af9fb0c0f99167ac2e47fd82483563d8f900d62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDE 10956 bytes
font_02_sfnt_off000135f3.bin
531543049abf073b67b788fbce997acdc70852c9fbfc87236fbec4230a58f3d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135F3 17188 bytes

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