Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3c6413c19195d74…

MALICIOUS

PDF

85.7 KB Created: 2021-06-26 21:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 79f5a93dbe79a496ed902cdb4ce70ee1 SHA-1: a940cfdc2421bdb8278b7f0a8943ae97cc7a491a SHA-256: b3c6413c19195d74f22ea1cc24e6817277b431138d260fcaa97681b8775017a1
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document attempts to trick users with fake financial instructions. Numerous URLs were extracted, many pointing to compromised WordPress sites, suggesting a phishing or credential harvesting campaign. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://pixomot.ru/uplcv?utm_term=old+ship+of+zion
    • http://jjmcp.jp/userfiles/Image/file/17483346319.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/8d9dc8e478f8c86d0ee8ee0b1bcc8c54/xojufoserutilopabunefo.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/68f124ca8a5f083e5a11d63d8b211989/10735371306.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160825a28e0584---45466668655.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/2f2b999b1283f1ab91de6a7791b6aa17/nirov.pdf
    • https://opsclown.it/ckfinder/userfiles/files/totolikirowapisevuvari.pdf
    • http://toshiba-center.ru/uploads/files/sizalinapemukixun.pdf
    • http://abbwingslynnhaven.com/uploads/files/padetola.pdf
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/q2atp3t0he8vqao3sd88bvh337/fovazebokunuxazirukijoj.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/1b7710b72d49e5170427d81576ecd7ce/31375142972.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/lc3nbltdm9c83md13hb318ha56/webogikikufuwa.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34f1bd47bd---82175172755.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9784cbd6c3---27715231591.pdf
    • http://recrute.fr/files/files/76592283028.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d89c3af4f---68283462768.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/5853dc48161b3293cfb8d0ac025af018/40414913926.pdf
    • http://rymwid-training.com/userfiles/file/ripof.pdf
    • https://stmarys-perthamboy.com/upload/File/kezutamawunudoja.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a323deea97d---12987252182.pdf
    • http://mid-europe-ex.com/images/blog//file/vozopufugusupavovife.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/eurb4dg6h6nb3s0icr9gg1srtm/38459403966.pdf
    • https://medtek.vn/storage/file/35233012543.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084a5525f620---72630477258.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_off0000edc3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC3 16792 bytes
font_01_sfnt_off000105d5.bin
38c7f1073106cc863ffb409ae980c70eb1afd4290fbfcfce2a417c98dc72c403
pdf-font-stream PDF embedded font (sfnt) at offset 0x105D5 17272 bytes
font_02_sfnt_off0001332e.bin
59b446eadb5c7f355bb7268e7ce1640f4df1668a0e7982628dc1e0d771c72d8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1332E 10188 bytes