PDF malware analysis — malicious · 9e79a8e1b0367a3a

MALICIOUS

PDF

90.5 KB Created: 2021-09-03 09:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: b94845b33cc9f239f5632d26ff59afa8 SHA-1: ed0930cb24ba05316ac21e3f6638db82e877db36 SHA-256: 9e79a8e1b0367a3a09284574e5c2e149104cecbc8d2186506b645df6e979b1ff

156 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, with numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, consistent with a spearphishing attachment attack vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9948

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://synerhu.ru/uplcv?utm_term=amsterdam+stories+nescio+pdf PDF link annotation
- https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/fab2b1701e16e54b41066534c28baba5/nujovalofigefovupemunoxe.pdfIn PDF document text
- http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c701f58c368---xabufolitufilevijevosuvin.pdfIn PDF document text
- https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd8d4481176---6852243893.pdfIn PDF document text
- https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/3aed69d5ec7a5736f52e32f226a152f2/44177322302.pdfIn PDF document text
- http://srlamn.com/clients/0/00/00e84243199fd86ca7c15d66a0237eb0/File/vazofegixepuse.pdfIn PDF document text
- http://ngocvietbungalow.com/upload/files/jevoxuwideguzegawegib.pdfIn PDF document text
- http://vishwkarmaenterprises.com/webroot/img/userfiles/files/lojegufefuvugeripalidade.pdfIn PDF document text
- https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/tfs0k4qhtqahsqscr53j2opsq4/4797638219.pdfIn PDF document text
- https://autosaloncenter.com/uploads/file/17279810439.pdfIn PDF document text
- https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e2d8673f6---namomuwosomesizixadigun.pdfIn PDF document text
- https://senesi-sklad.cz/userfiles/file/85036248162.pdfIn PDF document text
- http://edanieltour.com/FileData/ckfinder/files/20210818_2C5F1272DCCB59F4.pdfIn PDF document text
- http://myflora888.com/ck_files/files/3018792136.pdfIn PDF document text
- https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a56c7018b37---26748400054.pdfIn PDF document text
- https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608298d4c18f1---26230149167.pdfIn PDF document text
- https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/f687637c4a07677203775445207dd945/44515546824.pdfIn PDF document text
- http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160da6e53b8e69---83767881166.pdfIn PDF document text
- http://toonesk.com/upload/bokira.pdfIn PDF document text
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/64996ec85b9f5f41e1701764952675ed/givovijujebifarisa.pdfIn PDF document text
- http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077bc0fc405d---97602475358.pdfIn PDF document text
- http://vanharteyoga.nl/uploads/files/fageriludaputixazopo.pdfIn PDF document text
- http://svsteinfurth.de/radsportfiles/file/zojijudugiromurigowuzeba.pdfIn PDF document text
- http://adaviestransportltd.com/userfiles/file/levoladafuga.pdfIn PDF document text
- 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_off0000fa1f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA1F	19344 bytes
SHA-256: `f2de8ddd6ff058080745d169abb2e575adad693b00c65d242df7216f665270d4`
`font_01_sfnt_off00012bad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BAD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000143c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x143C4	10716 bytes
SHA-256: `f6089a6f7fc75f60482de0a01de729592ea08e394188b9ac5d17ec64f231df87`

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