Malicious PDF — malware analysis report

Static analysis result for SHA-256 60bd35362c20bdea…

MALICIOUS

PDF

86.3 KB Created: 2021-06-26 02:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e92192ebdf2849ee230c242c4baa559f SHA-1: 7b188c58ab3731a806f9335db00fae62659aee62 SHA-256: 60bd35362c20bdea45726683f7d695caf01b377246f62a2a572525f015dde399
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and points to compromised CMS upload storage, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://coretry.ru/uplcv?utm_term=renewable+energy+systems+engineering
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16098a596c3891---11757151573.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9c204f7c5---13444398494.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/b4de24bb2dba60454cbaea94ffea2aac/mulavesu.pdf
    • http://nordicaluminium.ru/userfiles/file/59922452535.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/be74c20c06cbe6040e70efd88bbdedf0/wijawenuvofuvavega.pdf
    • https://haltia.mx/sii/ckfinder/userfiles/files/95158923724.pdf
    • http://zabradli-znerezu.cz/userfiles/file/lejagikamuvisudapamidiwak.pdf
    • https://ksuskalology.com/images/file/55922207652.pdf
    • http://bagumul.com/file_upload/spaw_upload/file/20210616163155.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1e2879d55---98439198439.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88c029eed8---64138697216.pdf
    • http://vandientuchinhhang.com/upload/files/43302183593.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/8eb3f4a9d0c337d024dd09c37f91a95a/14951566083.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094319038095---rozomakibato.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/lk66o9n8k650b1hm8oi34luq6k/wuwutelejuwunasar.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/ffd5c2314e83e172154371c4f990b858/xexofuxujipo.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ebd74b475---96260249565.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094d358d4f9a---22984566222.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/rsn19lq2gcth3dg2l7g295po6n/dopavakum.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862b9a950f8---dobegewovarova.pdf
    • http://mega.kz/media/upload/files/gefutitod.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608631feb9a8c---15947086901.pdf
    • http://poorclarescork.ie/images/53277112591.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/baa144a94fb2dd8065f7187dcb248b3e/gamarodojoliv.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608297b21d20a---33130705719.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_off0000ee9b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9B 16792 bytes
font_01_sfnt_off000106ad.bin
e4570de4bcda030b6eee8da7e609d6d725e8347a268082376373e62f316d0bc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106AD 17000 bytes
font_02_sfnt_off000132ff.bin
e5c8301ce4c2d46702657e21f1ea436e7c108ff9512c0edbc952bac1faae2d5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132FF 10716 bytes

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