Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e5fd8f15e72a54…

MALICIOUS

PDF

81.2 KB Created: 2021-09-07 04:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e625481acd67a899c1bcec6b938838db SHA-1: 62acc2674724cda7b0124dc5014cdba23d9423ce SHA-256: 00e5fd8f15e72a54f6c6e5979b154d893c87cfa730ea6b30eb6b869f15ee700f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://coretry.ru/uplcv?utm_term=literary+movements+pdf PDF link annotation
    • http://alkanboya.com/files/file///tametuvepimototuzibu.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161202606dccb5---gupigikurafatotutiteg.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/90039684403.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/d0beoqrlbl6mntjq9elg0e4d02/1310795679.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/6397929986.pdfIn PDF document text
    • http://konferencii.org/js/ckfinder/userfiles/files/35062096558.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/ritozinipizor.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd4440f1a6---wivagazuwipetuvemi.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160732c786a872---ferajazo.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/48203712079.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160898f6b2aa0f---bekiputiruz.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/89437498499.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/zinerer.pdfIn PDF document text
    • https://vinocastillo.hu/editor_up/jurezaka.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab6b49decf---furom.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/30904891712.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210616115236_858tvu.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16088baec4bfd4---29806277956.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210525092824.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/26f384b4a6551c85fd5250e97fdbf79d/gemiv.pdfIn PDF document text
    • https://btegypt.comfile/goxamol.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a5db123b8---13132714916.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/gosoleveson.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7af3227db2---8563233569.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_off0000da12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA12 10748 bytes
SHA-256: c9de62bd8b7b3919bbf1d71b88164bd0983e90d25d366fce613397864ff63fa0
font_01_sfnt_off0000f2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D3 17608 bytes
SHA-256: 8fef7b5679db62f1688ee0e19264c322ea8d3933f33f7c29a6509452e9ef3048
font_02_sfnt_off00011f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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