Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc94f4f9152cc4be…

MALICIOUS

PDF

77.8 KB Created: 2021-06-27 17:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9398c43bb1f7a6f10927afb29f12f1a1 SHA-1: b54e83eb2a0dd8b4fc56439e2d4220e8898b4987 SHA-256: cc94f4f9152cc4be234a38ddd4c5801b01513e263fe5a1acc191b75d7ee1bba7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous embedded URLs pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of these external links indicates an attempt to redirect the user to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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://coretry.ru/uplcv?utm_term=marry+me+at+christmas+full+movie
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/4fe82c3b16b56531839b2b07d9827c65/pawabedikowew.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/9f42a7b80d973c7b7ed20baa1592fc67/sikitosuwazazo.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/rtalmkljvklbhmshuokga02gu4/jivigazixaximibasawimolam.pdf
    • https://barcelonacentremedic.cat/files/galeria/files/nivuv.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/f4603aea7df963220ad11690885998ed/19685097595.pdf
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/14b1cec5218ffea73afd5b2d9a5d5a03/pesiwedevu.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9bab78b38---munolawekapilogevurebup.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d31fe0b67a8---baxejojif.pdf
    • http://yavuzselimvakfi.org/resimler/site/files/nakile.pdf
    • http://reelproductionshd.com/userfiles/file/zutukupigalosewoja.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/534uil0ohdd2hggp0795pf8o7q/nuxafogukavojijubadigup.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca99bcc2a6---41481222963.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/d2e3b655f373c69aaa4001934bba8f1c/70075505952.pdf
    • http://kasargod.net/uploads/file/26375812112.pdf
    • http://imaginove.eu/data/Files/7771841139.pdf
    • http://studiotecniconuti.it/userfiles/files/lamebepajirotit.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607eeb6b42fc6---bibepiv.pdf
    • http://alpha-cp.com/userfiles/file/zagerafifiwogosobiza.pdf
    • http://www.logomarcanet.com/userfiles/file/90482386433.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/vixivotuvalimiwumoz.pdf
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/d935f6ed87e9e3e6a4195ef3d1eebd12/71405735666.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc67ac1804---vinususudizejapexanebobiv.pdf
    • https://bancodevida.com/bancodevida/admin/images/image/file/2438149177.pdf
    • http://boschvietnam.vn/files/usersfiles/files/notinuwafa.pdf
    • http://olgapolyakova.com/files/files/kiponikawen.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a92aa3680---72882236088.pdf
    • http://transsnabstroy.com/userfiles/file/89612828707.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_off0000cd85.bin
56601829167933f4f3db892f39f4b73d654ad2d974a3f5878917d148e02a5327
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD85 10772 bytes
font_01_sfnt_off0000e667.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE667 16792 bytes
font_02_sfnt_off0000fe79.bin
0db9f206e12eb4988702a3b25ac2d0513ef3887d0810c0e7bc86a82cea728d74
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE79 16676 bytes