Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e0cd78aa938489…

MALICIOUS

PDF

78.6 KB Created: 2021-08-28 17:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ee2ba3989fbfe5a2cf504eb51b08e625 SHA-1: 7233abfb3cb3502421cf6695a35f81f457dcecf2 SHA-256: 95e0cd78aa938489b9864f4b7a7d83627413db89586851407785f9b1c2011db5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious document delivery, often associated with spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://cructi.ru/uplcv?utm_term=just+be+patient PDF link annotation
    • https://rocksoliddesigns.biz/userfiles/file/dajibaveneratokuke.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/65023527101.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/0e461f7550b7e41c9865cf71cc75365d/14687746389.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076b62f317ff---34543587081.pdfIn PDF document text
    • http://gesht.ru/admin/ckfinder/userfiles/files/18641827792.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/badosuxidop.pdfIn PDF document text
    • http://glenbrooksouth1970.com/clients/1/17/17fc1bd13d5538a69f39d58c869d2fc5/File/murudajeli.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/42746096314.pdfIn PDF document text
    • http://clasesholandes.com/userfiles/file/70271006379.pdfIn PDF document text
    • https://media-get.com/userfiles/files/wagalovosix.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/0dcc59b1db47edeeccb2f13692732e31/67625822870.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/4c3a86f7a029fb6444d971c732a949c8/xulolatizeluxi.pdfIn PDF document text
    • http://getem.plfiles/file/xirini.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/jupafozapugotopirefeg.pdfIn PDF document text
    • https://emmaushuis.org/pages/12206619679.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/45217587844.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f0a43e991a---pulixexagatararezojudi.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/xupozapudamuxozos.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/833155b785146150443487b63fd3ff10/rodimedekelo.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/e96a1d695668e1d5e9e4aea8cbf23da6/bipobijele.pdfIn PDF document text
    • https://miet.hu/kepek/tuvagefof.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a59479682d8---fitewowud.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/29cdeed3044bcb63d993de75ca64a2ce/novufejivopivekeba.pdfIn PDF document text
    • https://mmszke.hu/files/file/xoxog.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f365a3cf6---ripadel.pdfIn PDF document text
    • http://pooq-design.com/app/webroot/fckfiles/file/tomobovozukujibo.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8ff40c69077342b742734c63511ca078/81149277123.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e6f37b50923---mirijemobotusuz.pdfIn PDF document text
    • 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_off0000d060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD060 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE872 17428 bytes
SHA-256: ffdeab02148a0ec3a4271095db1f9bd33479829489b889d9345aced0d5293227
font_02_sfnt_off00011498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11498 10212 bytes
SHA-256: b7098fb54801ee6cea450117daef483aed061663f702103ed9375a8acb36ac51