Malicious PDF — malware analysis report

Static analysis result for SHA-256 30e273fcc0a2699a…

MALICIOUS

PDF

96.9 KB Created: 2021-06-29 00:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cbca13defefd56a648e77d092c71545f SHA-1: df32777d023b99996f61e5e7dcac1d190c42149c SHA-256: 30e273fcc0a2699a8ef3491bfb005932559330a03f6ae6a26a5e9cdeea4078ba
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b4a048993---34449551767.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b784d4afbe2---divezi.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9e6bd0d6a---kagubuxitone.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160977ca28f88f---6261480906.pdf
    • http://ash-graphy.com/userfiles/file/regazabageboliwe.pdf
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/3747783358b6a027cf93fb212c392115/91318526036.pdf
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/dugamuminelexaluwal.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc2dc38948---91288488088.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/d5d75df1f245fedf7f3e05c352585d8c/daxodojunemuj.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa911ee06cd---pojamirurafigakof.pdf
    • http://talk200.com/admin/admin/uploadfiles/file/xikekoraduketa.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/0be94cd3a6a87a11028ccd08d27c64a6/numedupuderovabimu.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fcb030126---66989915307.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/dda3da1a3bc35922d9095b374aabd2a3/niruzod.pdf
    • https://lemanssrl.it/file/95319708442.pdf
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/rekiwulerizubegolasi.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/qp7t2g4n3a03a7jgfvdhm36sp5/44473783132.pdf
    • http://taxicityplus.ru/userfiles/file/89769607007.pdf
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/vaxinadijexesotokowukafux.pdf
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/vavej.pdf
    • http://atsrealtyvietnam.com/upload/files/65362772352.pdf
    • http://krukewittfarms.com/userfiles/file/63456756000.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/h6mc3q16lsqu6c5p8qjidoo896/ronalaxe.pdf
    • http://wksystems.net/HotelEstimator/userfiles/file/bufem.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=mmpi+2+test+questions+in+order
    • 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_off000115b3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x115B3 16792 bytes
font_01_sfnt_off00012dca.bin
3f827cc95f41ce993d16802db687b9b1230af773b4c6108a3836d4886a95ca0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCA 10704 bytes
font_02_sfnt_off00014626.bin
6a26f0701c9c94fd331adf065dea350e08824db14512557af6548c57c72cc0fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x14626 17924 bytes