PDF malware analysis — malicious · 9edca0aaa4775e58

MALICIOUS

PDF

74.8 KB Created: 2021-09-03 07:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: ab126b2f2b4bbbb384109a223899481c SHA-1: bb508f086fd42d9c609585c37eba3558b9e0d544 SHA-256: 9edca0aaa4775e588be00575bb4b71666e486625d80cba4d2e9b78de1426a367

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic firings clearly indicate a malicious link farm.

Machine Learning

Nyx PDF Classifier malicious score 0.7965

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://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/p4k97amcehcs7n110jethclge4/vunedoguf.pdf In PDF document text
- https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/0c29bd057c9660ab4ad2a533ccd27629/99616195846.pdfIn PDF document text
- http://awkontrakt.pl/ckfinder/userfiles/files/jetulexewazotegoluzep.pdfIn PDF document text
- http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088be5a1e344---97738347163.pdfIn PDF document text
- http://easyreturn.store/userfiles/file/malopedonumatimarirudolam.pdfIn PDF document text
- http://f-okinawa.com/img/tmp/files/11598002373.pdfIn PDF document text
- http://alexlunacoach.com/img/editor/file/verolezixefugilerotebofa.pdfIn PDF document text
- http://elskup.pl/images/assets/file/6019040698.pdfIn PDF document text
- http://www.groupementpecheduloir.com/ckfinder/userfiles/files/55571603656.pdfIn PDF document text
- http://macro-e.com/app/webroot/userfiles/files/70761594373.pdfIn PDF document text
- http://uppercanadatwocylinderclub.com/clients/877835/File/74910340536.pdfIn PDF document text
- http://aksaaydinlatma.com/img/editor/image/file/70513938401.pdfIn PDF document text
- http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeda73cf543---73439552099.pdfIn PDF document text
- https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/67qlsr5nnf44f2lsb4iun4lek4/12806039793.pdfIn PDF document text
- http://gat-asset.com/CKEdit/upload/files/90235695992.pdfIn PDF document text
- https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61b3c9ccdc---roliz.pdfIn PDF document text
- http://tuderprogettazione.it/userfiles/files/nalupof.pdfIn PDF document text
- https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/88088d72f74b618550e433bbfa0b8a70/26841461578.pdfIn PDF document text
- http://malabarisproducoes.com/arquivos/files/vafagonagazijarikosom.pdfIn PDF document text
- http://valdhans.cz/userfiles/file/tuliwov.pdfIn PDF document text
- http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/35717152467.pdfIn PDF document text
- http://koreaseals.com/ckfinder/userfiles/files/92625631281.pdfIn PDF document text
- https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/7768edd797482a1baf165c4630817828/lijobete.pdfIn PDF document text
- http://vendsol.com/userfiles/file/992032410.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=pulmonary+edema+management+pdfPDF link annotation
- 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_off0000d234.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD234	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ea4b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA4B	10796 bytes
SHA-256: `a6d9863cb74b8a4446b90cb91717f88613f230b3a0498e6a9fd72aa126fd9d9e`
`font_02_sfnt_off000102f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102F9	17324 bytes
SHA-256: `6f6635fdccd37f452e3b0964294a257eece21f2376bb40fb5024473e5a049695`

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