Malicious PDF — malware analysis report

Static analysis result for SHA-256 be802d04a81bcaf0…

MALICIOUS

PDF

92.9 KB Created: 2021-07-17 09:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 336df994fddbfb0f871025d34e46ea16 SHA-1: 8d5d9c2363b4f9b934ff8a16b28fd0e08c6f45b6 SHA-256: be802d04a81bcaf03b68b92483b5df8743f059c51afdc40919b3337c1eb18c54
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites hosting other PDF files. Heuristics indicate this is a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608992b623fd4---wogovumelanonuj.pdf In PDF document text
    • http://eot.mn/uploads/userfiles/files/sajewupadego.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3141e46076---23770936685.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/23611193798.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/jodiredobibigisudejivim.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/2bd4231dc0bbe642880276964638afe8/gitagusetipuxerazowoluv.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/7teet14lq5vgqac4k3i3ll66is/90817909865.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca5c8acf4a---wovevumolumagewokugegapet.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/29jvkplgfs7u20t57fad64lt1b/68141667228.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3479cd597---ravugetanabadasefek.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/36843312465.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/56956188097.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9281031b3---pasokesojemiwira.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/5b0b34054e3d9a91f6801e04e6543217/perozuwinigosarit.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/2434nisng1j8e49mt6b8jf58ag/ruzimidorajedukopagi.pdfIn PDF document text
    • https://channeloflove.com/ckfinder/userfiles/files/7198566420.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/pavuwulerijiwoji.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b60514ceeeb---maxifikomomeroda.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/5274a71a5337594d69860541b769e3d3/29731868081.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/2dt4i9toj82tj1v676f6g8q288/sisosawowoxe.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/xegorifomelewubazonomad.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/zonafubenunibupox.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/uedarbk4v8ju78g8jc20u0i812/rusuwufelowagokukajiwe.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/49ce212a05af74b2936ac6c3a991a0a3/92106969778.pdfIn PDF document text
    • http://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/rulozonuxabomunis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=driver+san+francisco+pc+trainerPDF 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_off00010569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10569 10492 bytes
SHA-256: 19e17cadcee7108da0381bdb3c9b1a730b27cdca87d9339d350883247c0f2b15
font_01_sfnt_off00011d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D76 18512 bytes
SHA-256: ed141a842d867bdb0f20cc6269722b929eb90d9d1f7df3643673d56c4195ec5e
font_02_sfnt_off00014deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1