PDF malware analysis — malicious · 50ae2547d87cc17d

MALICIOUS

PDF

92.6 KB Created: 2021-08-09 02:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 832007d201838965f9ae31ce5580519f SHA-1: 44a7c31de1af2e8d43dc1f2431a3409bbcaa2a26 SHA-256: 50ae2547d87cc17d76811a1e4b02793f8fe48bda9a3c39026a5b169e047b9947

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories on disposable hosting. The ML classifier strongly indicated maliciousness, and the heuristic firings suggest the document is a link farm designed to redirect users to potentially malicious content on other sites. No scripts were extracted, but the primary attack pattern involves luring users to external, compromised resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9897

Heuristics 5

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://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/bab136ae121035c9e768713c2466de05/tagozudi.pdf In PDF document text
- http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160928305d2499---36611857694.pdfIn PDF document text
- https://www.andreivieru.com/ckfinder/userfiles/files/jonolobuzijamapejujidixeg.pdfIn PDF document text
- http://nacyc.jp/Upload/file/49337155772.pdfIn PDF document text
- http://delshadian.com/public/userfiles/file/28217173855.pdfIn PDF document text
- http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/htkclmj43k998mqvd73nfcv7u1/mimudegezud.pdfIn PDF document text
- https://sailstudy.in/ckfinder/userfiles/files/65878702509.pdfIn PDF document text
- http://prmakeup.com/Image/files/92700092497.pdfIn PDF document text
- https://cualuoihoanmy.com/uploads/userfiles/file/27831279718.pdfIn PDF document text
- https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/dee6dc1234fff9ad838d7f35e83e0c27/dilifatenamitab.pdfIn PDF document text
- http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a78ff0ae09b---38507352256.pdfIn PDF document text
- http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8d6d55b28---64371894012.pdfIn PDF document text
- https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/83c446e0433ec420f194f1091f3ddcb1/28025743179.pdfIn PDF document text
- https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a7ea988e2---petipajaxomiwarizitova.pdfIn PDF document text
- https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/006a66201ebb1ee1685945e255d4ffce/58984794782.pdfIn PDF document text
- https://dreamscapes.ca/dream_scapes/userfiles/files/getuvexavatojikumezepanu.pdfIn PDF document text
- https://dogathermalhotel.com/resimler/files/gupomogavudukuxuporepini.pdfIn PDF document text
- https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/656c87847002178fe5d873e72009d1c9/vuwuxevowopalozeto.pdfIn PDF document text
- http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c885a897e8f---58075106137.pdfIn PDF document text
- https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/e6ip805dg5eskjkfgb29a6t2cc/luvesetetekopig.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb9a6bc2ab---roladevikeborusidepew.pdfIn PDF document text
- http://quaretti.it/userfiles/files/lizedopuwo.pdfIn PDF document text
- http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160822368e6721---56633358123.pdfIn PDF document text
- http://daindnc.com/fckeditor/userfiles/file/86503670830.pdfIn PDF document text
- https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/4bae300ff1136fa1155594996f412f3a/69078665790.pdfIn PDF document text
- https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736b3fa0ca5---40619487336.pdfIn PDF document text
- http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9fdb271d72---pamidal.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=tengo+dolor+en+la+parte+baja+de+la+espalda+lado+derechoPDF 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_off000102d9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102D9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011aeb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11AEB	18040 bytes
SHA-256: `511738c020bb6d8f1bcf268f5b278ce01f265e37f1b465a83decd543ebcd6b99`
`font_02_sfnt_off0001491b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1491B	10936 bytes
SHA-256: `3ff66b446bc9e99d15bacb85f5f456e5c1eee53b27c63babbb6e1d25882b8f20`

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