Malicious PDF — malware analysis report

Static analysis result for SHA-256 039900e1945baf32…

MALICIOUS

PDF

88.7 KB Created: 2021-06-29 21:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 12f9ac4b6ae136bd6fde3a3cd0b8fe10 SHA-1: 3729869564410df9d0f5c0cf00677844dbd9e709 SHA-256: 039900e1945baf32557d418b38c9a9c210a10242637e0d8bf76bffe435c2e16b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://laborke.ru/uplcv?utm_term=google+account+manager+9.0+apk+2020
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075bda514f3f---58110818685.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/7daf15e27481336e4eacd07afd37534d/xawovi.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3cb8eb2947---69443826389.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c0bb6b05fd9---88734812771.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfeeed4651---xaritomuk.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/335ktv3bgumdr3vef0amph69p6/tizokomezuxelubawusidob.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/1dbed0d1e86c00dd8064277147d0ba6a/porajaneviduneritomefige.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b87f0b55056---berejokawifovav.pdf
    • http://markone-tools.com/upload/files/24329210149.pdf
    • http://greenlivinggarden.com/htdocs/UserFiles/file/malobukonujibidefupesu.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/a39e01e0a23a5a8b577afa7f1dbd7e22/kukigidupagetaluvuw.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/de67487287e0a73490e6a0b70ccb6490/58375419885.pdf
    • http://delannahotel.com/user_img/file/fobilu.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607808ace31d7---219906983.pdf
    • https://muguet.fr/sites/default/files/file/66986372814.pdf
    • http://goldnumber.info/userfiles/file/rujawuguvibemizizenudut.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607064662566e---77807760179.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc08d747da5---kenezipodajemok.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/83juggb8l4m220nveu8iifbn02/48465428952.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aaf129f833---49469892639.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608201307525e---renidowozefujufaruzurakit.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076fa0fb8257---wifemagolirofaroj.pdf
    • http://vzwsportenmuziek.com/content_docs/kusudegajezunizam.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/0d5b7152b2d9d1da258112a190cf8438/81816008900.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_off0000f567.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF567 16792 bytes
font_01_sfnt_off00010d7e.bin
0734dbddfe641f216eb2ad62a95ab1c5bbbf95370eadc2d0a9e7b31bb6132b20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7E 11164 bytes
font_02_sfnt_off000127b5.bin
b3dca01507d715df46e07467fc50486d87207347e854ff6e13231f551dd54d8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127B5 17712 bytes

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