Malicious PDF — malware analysis report

Static analysis result for SHA-256 52183805877c000f…

MALICIOUS

PDF

85.0 KB Created: 2021-07-05 18:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c81e9fd3eceb8b0e2c726a0915c33378 SHA-1: 348240ac003b86ecb2560235d02f55a2619511f7 SHA-256: 52183805877c000f513f25b112f3cad3c3b3eaa7c8d1459bbe742e1e3460b22e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm directing users to multiple URLs hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and numerous external links point towards a tactic of overwhelming the user with choices, all leading to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a70b9445e9e---ludasugozevukedeboni.pdf
    • http://ecofincas.net/ckfinder/userfiles/files/32121459576.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfd85156ba---12195849838.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/1d75feccb11d3fb6ea6aa4ec5bcc8d7f/75925317070.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801e3dafcf6---bodojubazimigazasotako.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/csoleoi4mhnkmequjflsq1ckom/74646384629.pdf
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/rejepawixetuzekigevimaki.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b1cd4aa05---jibatekukenefatigovadonu.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc092c1310---62097905829.pdf
    • http://amandatravel.com/userfiles/file/49701807494.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/92d04ac88d1c00e58f93aaf37869b86d/35675417599.pdf
    • http://andrelandberg.com/userfiles/file/zefetufamofixe.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/ih0igi8aeu1rhv6h3ug76crmmd/nefozewoniganiwope.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b755b8186fb---51154385895.pdf
    • http://royalwedding.jp/images/blog//file/vegefivowokijok.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8090a14d8---gamudedovufirigavulogipap.pdf
    • http://reicar.dk/userfiles/file/pamukokevadekitegitifan.pdf
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/32d5753ee869eb53e0dbbd1f5459e305/nudiwituxuzobo.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/6llc0fj0hgp1l89rl4jo11acaho9133a/91488155144.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/b83d80ccc88bcaf34139ee50f04fb0bb/fotuvekapabijajotapip.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc026d72367---wetepumozepidupi.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160778245d37e8---pitinigiwejepalixuwi.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/aee18d9608cf90750b6b7e3de2ff7994/35046591596.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=do+not+take+life+for+granted+meaning
    • 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_off0000e9d8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D8 16792 bytes
font_01_sfnt_off000101ea.bin
18ddbf06aa401dfce2a72c4bfac5d58f94432298b0e9726065189193db79046e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101EA 16624 bytes
font_02_sfnt_off00012ce8.bin
8408e9f0a297d7a7b39ea5f6ff9d7aca7baf8a4860a264f426758a4ee8e85a1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE8 10624 bytes

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