Malicious PDF — malware analysis report

Static analysis result for SHA-256 d032607df5988081…

MALICIOUS

PDF

79.6 KB Created: 2021-06-25 19:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f3b68dbe5f7b6038f2ff5a05d020dd25 SHA-1: 277226236a45a46b8ac017034b697695f02e27fb SHA-256: d032607df59880812c231caadd041491ffed7f95646b84b96644bebf31a2b020
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely serving as a distribution point for further malicious content. The document body is heavily obfuscated and unreadable, suggesting it's not intended for user interaction but rather to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://garglob.ru/uplcv?utm_term=four+major+foundations+of+curriculum
    • https://goodluckfishing.com/ckfinder/userfiles/files/jerugogat.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609debf795d1b---wifefovokibetadun.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160a578223d2f2---surunibegupapedepe.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e385d15c64---93549658939.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/3fe36aa638e219349efe486c2b8f7021/33286332410.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff86412b6d---jotibujuwugaziku.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4c0056b6b---96987744092.pdf
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/32218320687.pdf
    • https://leuphuotcamap.com/uploads/image/files/loxinonota.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0c3eb666f---julitadoxekefujiv.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c606e91b218---35633415954.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/66e3056294450cea2ea0e5fd4ad2fc20/91386370862.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a32513c7c0b---numasewim.pdf
    • http://hanboo.cn/Uploads/file/2021060623442170554.pdf
    • http://gyobel.it/public/file/45387946453.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce378a803a9---gafat.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/08289493e20ba99752648e8d60682d4e/tuwulolipoku.pdf
    • http://esipro.lu/userfiles/file/juzurivopazun.pdf
    • http://big-blue-bus.com/pics/fotos/1/file/pizowuxas.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b18c356968---sixewexalevupegipinimenux.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/a2c8085abacd0cd74237b397438d2c04/33360073034.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6ac7374ab---puziriwelutubiv.pdf
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/mh12rsshmhhs42ssnhlnme3kc9/86265611319.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_off0000d5d9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D9 16792 bytes
font_01_sfnt_off0000edeb.bin
626978f2736ee1af18d58c21cc7f9193378445d751900df6156a9c8b67944a3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEB 16468 bytes
font_02_sfnt_off00011870.bin
771bced8e68bc1d8ae71dc076d1a93a86f45b68e9e1a1d9500bf93b9a22e1986		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11870 10712 bytes

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