Malicious PDF — malware analysis report

Static analysis result for SHA-256 d762473396feac48…

MALICIOUS

PDF

94.0 KB Created: 2021-07-23 21:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 74c67a266bfd00102523fcee874967c8 SHA-1: 93657b7bbd90c40a4b52fd3a2df3a6eb0ade14a2 SHA-256: d762473396feac48151089fb18927419bbc9c25714b7df57207c95c2b920ae3a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. The presence of embedded JavaScript, flagged by heuristics, suggests an attempt to execute code or further redirect the user. ClamAV detection and ML classification confirm the malicious nature of the file, likely used as a lure for phishing or to download additional malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://baybayankaauamo.com/clients/c/c9/c9e0f772d4a556598cfa564a27137582/File/jegaju.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091707d6428f---wewipogixeboralorebix.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/a6025d45cded07c63b189b26c1d6413b/pakaworaxenir.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f3537ff0e---23579524443.pdf
    • http://originalcheck.it/public/img_admin/file///47634403714.pdf
    • https://minervatech.work/js/ckfinder/userfiles/files/vezodijefugumaj.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774ae2a3da1---31807945251.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a36d22bc1f5---bazimor.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/5919db2ca0820030deaf1b2fa61b6e84/67843145093.pdf
    • http://fygl.net/uploads/file/021105508568.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bab2983bf9f---7031048235.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d410927cad0---pojofototiwakasej.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c84cb3f3ef5---zodezevebam.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/mhq4l1q787h294ksev7c7r31uh/64137495420.pdf
    • http://ubestsports.com/imager/files/20210621115447.pdf
    • http://10glazsikeyrosa.ru/file/wofadunadikulozudiko.pdf
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/23219749259.pdf
    • http://kapsalonindex.nl/images/uploads/duzokoduzarofemivan.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be2def896ae---ramazopegulen.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3e608d22f6---gerivusisosasuf.pdf
    • http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/sumetanemajokunexaj.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8a6040fea---53325657274.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d6e89674a03---46322534858.pdf
    • http://beta-rc.com/upload/files/30686831524.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e19eab723---miwedadepelagisuve.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=fifty+shades+freed+full+movie+download+in+hindi+filmyzilla
    • 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_off000108f8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x108F8 16792 bytes
font_01_sfnt_off0001210f.bin
55281c6dd597e96aaa424a2d098942f5b1f3b07bd4fe03ba8602769c451fa770
pdf-font-stream PDF embedded font (sfnt) at offset 0x1210F 11020 bytes
font_02_sfnt_off00013a8f.bin
ad0f26b025f80c8c4104aa1eedf2a5bfccd7792a68f7b326963ca1bb43491a83
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A8F 17240 bytes