Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0bb7ae069c0730…

MALICIOUS

PDF

98.9 KB Created: 2021-06-26 22:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e4b23e242f1da084b0bbb7d25b20602d SHA-1: 51079941f24662d3ad82022e971552087372522e SHA-256: 5e0bb7ae069c073007cfca5d9c4998a49ea5848c978b442aa22502c9bd144511
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF contains numerous links pointing to compromised WordPress sites, specifically within the 'formcraft' plugin's file upload directory. This suggests the PDF is part of a link farm designed to distribute malicious content or redirect users to phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca0ad9da63---mumakofopumenopiderarami.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160919dcb76ddc---maredobekibelovadiw.pdf
    • https://dogathermalhotel.com/resimler/files/64594643173.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/f08554890846880b66c6ad60991fe873/6274274804.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608615ec5f97f---35714298291.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2dd37365d---88511040742.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcaee101a25---12184133060.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608343ffab5c6---80298951739.pdf
    • http://anhbanglaw.com/userfiles/file/46110669158.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bec27e76583---pawugabodoxatepejas.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/fpgjvag2vn4sp1qrdc58kvpsmb/pafitalebudirevimesobiz.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607acac7bf482---72632861720.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/4a9543197c0984ebef77848b4cdd7a9a/fizodi.pdf
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/23947235070.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/b4599e079f077e9ebcb246463509d03b/tufajek.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a60dda144a4---98087116628.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609790985b5fc---kenafilegoriditi.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789ff1b155f---naxejebuzexezugojode.pdf
    • http://businessvaluationapp.com//fck_files/file/falubulaxotafovazu.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160915ee5ef436---delozosunonefaxatarena.pdf
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/livowuwa.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/91169b1a75e730ea0d1936e61db92743/limusatugesipepugumawedet.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/uq9u74gb8c2i6hak9nvs7ev2s0/74435483521.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/ruicp0s5mf10mvvqsbe7mgeli1/34850910957.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=usability+testing+in+software+testing+pdf
    • 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_off00011f5a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5A 16792 bytes
font_01_sfnt_off00013771.bin
b5c7c0d13bb97e1edbed9247b8d35bc3a8d28e78de55e71dd72aa95f3e64b6cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13771 11020 bytes
font_02_sfnt_off000150d7.bin
2467a18185c721ec47c8aab87653af45399ccc1c3766f0b7d3e6eb09dd1084d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x150D7 17268 bytes

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