Malicious PDF — malware analysis report

Static analysis result for SHA-256 247404cf3d6ea18a…

MALICIOUS

PDF

78.0 KB Created: 2021-08-19 04:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 40c631e750189c6ed57096ad6af14c60 SHA-1: 9f7738e2467b6b6e1324b7d1eb3bf3c41590abfe SHA-256: 247404cf3d6ea18a7de6f82ef6a1b0822c26468ec75a4767b7a575155758c398
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to various websites, many of which appear to be compromised CMS uploads or hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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.
  • 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 http://righetti-ticozzi.it/userfiles/files/87044996219.pdf In PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610307299ca65---84539697112.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e017c9d58---56636412134.pdfIn PDF document text
    • http://cuacuondaiphuc.com/upload/files/mematixopegota.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/84275885304.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b26af89a57---xisakanib.pdfIn PDF document text
    • https://sofahatinh.com/upload/files/bilasanometopifowagam.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/79666869600.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/q4oiubs3b9hhtkgg8017846rpc/48775484769.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d07cd775b68---71486324701.pdfIn PDF document text
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/27668870738.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/4be4fead7bcb9b109a06aeaf63111ea9/kifinojugututobowapefo.pdfIn PDF document text
    • http://dkyangmei.com/uploadfile/file/2021062721445373499.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/s1tf2jjsm69vo3afvgbrtvaeb7/28601118816.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfb59b5243---17228838665.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16081389a9c232---vevaduv.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/5f2r3hotgv475rva5e05naujc4/2220715278.pdfIn PDF document text
    • https://immobiliareincentro.it/allegati/file/25403722594.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/nekuxerawivuralileli.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093d0a18551c---25178795869.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075975230872---76988280666.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3b969d22f---50178202653.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/21187859818.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/tipuwifapusojizedew.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16239518809032.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=ba%C4%9F%C4%B1ml%C4%B1+ve+ba%C4%9F%C4%B1ms%C4%B1z+de%C4%9Fi%C5%9Fken+nedirPDF link annotation
    • 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_off0000cb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB4B 17156 bytes
SHA-256: ce7a35c35bfb742e6732d481f9c1ff2f9fed6c639dd4a7ae71ec69c7cb216280
font_01_sfnt_off0000f532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF532 11124 bytes
SHA-256: 49c2ef82ea2a1912f7f4141cd36b97b3db6989a76712b79aa5482e7dafc81c06
font_02_sfnt_off00010e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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