Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6274a58f9cf5fd…

MALICIOUS

PDF

61.2 KB Created: 2021-08-30 13:36:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c078d55b6229b51c9fe9c41fa05e956d SHA-1: dcd1a25a13fa33e02fa360897ff39a983754b074 SHA-256: ce6274a58f9cf5fdf80d4f40bca094ddc2b1bcce29ac0b0356e0843f3faee983
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and disposable hosting, likely to facilitate phishing or malware distribution. The presence of external URIs and link farm characteristics strongly suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9201

Heuristics 5

  • 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
  • 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://smidgel.ru/uplcv?utm_term=assembly+parts+drawing PDF link annotation
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160705439464ad---33850052574.pdfIn PDF document text
    • http://fabtur.ru/upload/files/86226185194.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160d63448c1040---fuzosimep.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/13305901818.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/27084452534.pdfIn PDF document text
    • http://scro.ru/pic/file/93669639800.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/be54c38a7d17fa7ea56d16f6f9a0b6dd/rojisosowuxenuj.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/44c1e5e7ad5dc0c700ed9323459fa58f/47074930461.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/58473584692.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/gosinotir.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/6cc234537a3fbe797ebf5d8aa4dce3e5/31128672743.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/7416fbdfb28e97e871f36beccce03223/74216099609.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210804084234_3e0ne0.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/dagubevumaxuze.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/mufegaxujizukuxagopiwi.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/71738219778.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/30215983197.pdfIn PDF document text
    • http://smn69.com/clients/866038/File/59459667666.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/08/16/fagujimoma.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/9348009208b90bfa4c1245191109e1ff/74524796810.pdfIn PDF document text
    • http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/14893406299.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/liladenikafitosobalawasos.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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