PDF malware analysis — malicious · 04850d46c680258b

MALICIOUS

PDF

78.1 KB Created: 2021-08-16 20:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22

MD5: 6a87b5dda5b3f3194a6da404cd331a2b SHA-1: 8a7946587fd52a569885686aa9becb4f4ea57909 SHA-256: 04850d46c680258bec6d372aef9570649b70e2a68752e9e2cd18a342e696e1f2

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The 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 embedded URLs pointing to compromised CMS uploads and disposable hosting domains. This suggests the document is designed to redirect users to potentially malicious sites for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.7431

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://smidgel.ru/uplcv?utm_term=but+not+the+hippopotamus+summary PDF link annotation
- http://attlas.center/userfiles/file/54318225338.pdfIn PDF document text
- http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4c36a2b57---48736966454.pdfIn PDF document text
- http://karmand24.ir/basefile/ehotel724ir/files/lipalodugibowapalula.pdfIn PDF document text
- http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cc76723e922---39106362028.pdfIn PDF document text
- http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac43fd75e99---77689971512.pdfIn PDF document text
- http://dhsclassof70.com/clients/d/d1/d13f49183e6b2ef720c1f353b43de0f2/File/danulufarakelowimizib.pdfIn PDF document text
- https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/db98666b26be4936e0fcfb1e152fec96/futezupame.pdfIn PDF document text
- http://bsp-oblspl.org/ckfinder/userfiles/files/39326289284.pdfIn PDF document text
- https://gemwares.com/userfiles/file/vugemafunegufivanonugave.pdfIn PDF document text
- http://tfh-filter.hu/_user/file/nusuzaxu.pdfIn PDF document text
- https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160f4c6623d422---vojuvesapijix.pdfIn PDF document text
- https://burgas-remonti.com/userfiles/file/27885393130.pdfIn PDF document text
- http://summithighschool1958.com/clients/71652/File/zideteworavoxi.pdfIn PDF document text
- http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ddea62d9341---bodegabuwujeguva.pdfIn PDF document text
- http://tjclassof1971.com/clients/1/16/169b02496b2253913efe31a5b05f4f66/File/95881696586.pdfIn PDF document text
- https://palezieux.com/ckfinder/userfiles/files/98507377306.pdfIn PDF document text
- https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/171dc8117fcf2dccb87bfb53015796b3/fazemog.pdfIn PDF document text
- https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/7f152db00e6085d744b6bf1b297bd4dd/67680000151.pdfIn PDF document text
- https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/922d31cb1ff1f78b927c82e45dfdfb2f/67594778730.pdfIn PDF document text
- http://cupta.org/userfiles/files/20210527181924.pdfIn PDF document text
- https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a21f202dab---xitumipimef.pdfIn PDF document text
- http://giustizianuova.it/userfiles/file/jutugatazomiza.pdfIn PDF document text
- https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/sefifetosuvunu.pdfIn PDF document text
- http://barbusci.it/maisUserFile/file/kirudal.pdfIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f882.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF882	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011099.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11099	10740 bytes
SHA-256: `e9037d577a00ad031addd2faaa08924941590124f471fdfda9004974cf63726e`

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