Malicious PDF — malware analysis report

Static analysis result for SHA-256 328d65432e59425a…

MALICIOUS

PDF

81.2 KB Created: 2021-09-06 20:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d60da2d1e49838254a37d9494dddef7c SHA-1: 225f3967b5b77ed9dcf33f82b3fc962501d1a15f SHA-256: 328d65432e59425a13e56ece4887f10fbaa9222d5dc8a2c5da549f8d6d552b82
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The embedded URLs and the nature of the heuristics strongly indicate a phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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=organisational+change+development+and+transformation+6th+edition+pdf PDF link annotation
    • https://condicionamentofisico.com/arquivos/file/33109028091.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/lixiken.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/xibetebaxegugozape.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1381db540---puvavafoke.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/3f8cd89f2d9e482d2de3d8eaf46db318/nizomow.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/bokalomifobu.pdfIn PDF document text
    • http://ridgefieldpark1967.com/clients/3/39/39eebdc8797e30ee23d4fd57d071fd44/File/46456904457.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/gozidubonidupikirabejubob.pdfIn PDF document text
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/tmi2aga58778ntgibkkccc7ila/84712470723.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/fbd3f5c4495e0e2b01890451c7db61aa/votomopikofujijerajimopov.pdfIn PDF document text
    • https://innovativallatgyogyszer.hu/fileok/file/50802957443.pdfIn PDF document text
    • http://codienlanhtrangia.com/Images_upload/files/bubefetogibojaboza.pdfIn PDF document text
    • http://changecn.net/ckupload/files/gagumelujof.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/53080719582.pdfIn PDF document text
    • https://karlholmbygg.se/UserFiles/files/1107042673.pdfIn PDF document text
    • http://ekotronic.eu/files/file/18854627043.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/ktqef5v01u8h9978l1ihspgsp0/85746230415.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/46638955584.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e912fa6aca---96341855602.pdfIn PDF document text
    • http://www.conectadoscomdeus.tv/arquivos/file/dijakegu.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/49b4f5531123b9752d25766357c2390a/270929036.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608406eadc02b---91854748838.pdfIn PDF document text
    • https://bselink.com/userfiles/file/fikunuguzomivepavo.pdfIn PDF document text
    • 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_off0000d644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD644 11324 bytes
SHA-256: 26466e1cb41b956fbadc19fbaa06256a78e913d5e7a0ca62583f89074f273428
font_01_sfnt_off0000f087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF087 17864 bytes
SHA-256: b91224c9b508cd10955408743cf3d4dfc5131b96aed0d0402ac747c3db75d1f9
font_02_sfnt_off00011e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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