PDF malware analysis — malicious · 3434b8b290e4a95d

MALICIOUS

PDF

85.1 KB Created: 2021-09-04 11:22:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 06cbdb66f87fc347676dd50e9fb3ed74 SHA-1: d896f1dc08f9382a1363e3dffc06c337368e336a SHA-256: 3434b8b290e4a95d91bff629e417e6c6980cd27dae1935ba8ddc6b252e69eaa5

104 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to compromised WordPress upload directories or disposable hosting. The ML classifier strongly indicates malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to host further malicious content or phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9905

Heuristics 6

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://uitetenindex.nl/images/uploads/3178606977.pdf In PDF document text
- http://thesnowmanicecream.com/ckfinder/userfiles/files/winoduletulal.pdfIn PDF document text
- https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/drmp5af2shda780grsc3lc32g4/60459002514.pdfIn PDF document text
- https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/69527080944.pdfIn PDF document text
- https://akanaymatbaa.com/calisma2/files/uploads/38263309798.pdfIn PDF document text
- https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/6kq3slc6bdus69fog92ptqgibp/11710807973.pdfIn PDF document text
- https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/7a47b3f7ea3b49aa2a249c7f803835f7/57605371519.pdfIn PDF document text
- https://villanakarin.com/userfiles/files/gadimado.pdfIn PDF document text
- http://conditum.nl/userfiles/file/9449982130.pdfIn PDF document text
- http://gaineyranchaz.com/userimages/fenapezesenakizipej.pdfIn PDF document text
- https://dagvandearchitectuur.be/_files/file/29753253197.pdfIn PDF document text
- http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/cp0enh38gas9qo204frke4r640/28879879329.pdfIn PDF document text
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b07ed797eab---30132483415.pdfIn PDF document text
- https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/5jire727fjghkjq8su3emufgfu/foveram.pdfIn PDF document text
- https://ruiguoex.com/upfile/files/2021/07/19/31314283033.pdfIn PDF document text
- http://careerpathrecruitment.com/swapscan/app/webroot/js/ckfinder/userfiles/files/vipanubixuwob.pdfIn PDF document text
- http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/guxaduzojerarafuxuwaxaw.pdfIn PDF document text
- https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755c3bbe285---65414713519.pdfIn PDF document text
- http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1fa9d1aae---68278507015.pdfIn PDF document text
- http://tulsamemorialclass1969.com/clients/8/8b/8b8b36ecbaf17f244e47af75a29dfbe2/File/remofewidafekusapudevisu.pdfIn PDF document text
- https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3d3bd4b7c---ziwalumerebixede.pdfIn PDF document text
- http://www.prieteniitehnicii.ro/documente/file/60560195256.pdfIn PDF document text
- http://maility.pl/_ADRESuserfiles/file/kekufovepudumodulamig.pdfIn PDF document text
- http://www.scsk12.org/policy/files/files/tosok.pdfIn PDF document text
- http://didaconcept.com/admin/fckeditor/file/41994271054.pdfIn PDF document text
- https://bahispesinde.com/gnc/veri/_files/gulilonelinikas.pdfIn PDF document text
- https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/cb0b031a1e3a5b746b3a6bd9c220b149/vudadifepesulubafe.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=inca+civilization+pdfPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e812.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE812	17992 bytes
SHA-256: `1c3c4ea1e31bb89639ebd3dc264c521a9e1e0faf3e552f471b6c6782c8917d78`
`font_01_sfnt_off00011701.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11701	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012f18.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12F18	10288 bytes
SHA-256: `ad7b98adf0f9a2a31e9fdc799ae2b98b3d0cd84f4cb8d0b70d3bd6579c588c19`

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