PDF malware analysis — malicious · 5c7eb3f7a7de7429

MALICIOUS

PDF

85.4 KB Created: 2021-06-29 05:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: af3f7b246f2903940f14cf5e940b476e SHA-1: 2d3a222e80c1cc3749bedb56e13b1dabef8e74f9 SHA-256: 5c7eb3f7a7de7429b7a3aacb78bebdc0c2d13c13236435e717708b8d7798cc19

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to multiple domains, many of which appear to be compromised WordPress upload directories. The ML classifier strongly indicated maliciousness, and the structure suggests an attempt to manipulate search engine results or redirect users to potentially harmful content. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

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 http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/netevabesekobonu.pdf In PDF document text
- https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c87542e73e---lukesovamaduragamoxijexu.pdfIn PDF document text
- https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710ed0f0445---38416066493.pdfIn PDF document text
- https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/6bf29d4a3de6a0d6d75a1858995455db/89567282380.pdfIn PDF document text
- http://anhbanglaw.com/userfiles/file/30522638201.pdfIn PDF document text
- http://zulassungsservice4you.de/bilder/file/41363751471.pdfIn PDF document text
- https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/38b2d8a8cc48d403479e1da6ccf4782d/fudedoloxonixatodedo.pdfIn PDF document text
- https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/a19389416b714880a40e882c2a64b938/zenolosipunonol.pdfIn PDF document text
- http://sungsam.net/userData/board/file/49909301872.pdfIn PDF document text
- https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ca5709eae51---33055694058.pdfIn PDF document text
- http://bagumul.com/file_upload/spaw_upload/file/20210520054151.pdfIn PDF document text
- http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xaposok.pdfIn PDF document text
- https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e884a569a0---28474476833.pdfIn PDF document text
- http://15fratrowreunion.com/clients/2/2b/2b18ccadde375fd95e9ac2d5db5aaa67/File/72904739353.pdfIn PDF document text
- https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/3kthlaf7st0n2p6hjf1rmpivo0/80208029500.pdfIn PDF document text
- http://teplolux72.ru/upload/file/bapesituxelifonoper.pdfIn PDF document text
- http://aryajob.com/user_upload/file/xekefofakemonekoxib.pdfIn PDF document text
- http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087ca416d737---wofavorodifajebi.pdfIn PDF document text
- https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/917a7e6a4070789acc2de17039985531/60674748252.pdfIn PDF document text
- https://egf.tw/test2/images/file/35067286984.pdfIn PDF document text
- http://aldara-latinoamerica.com/userfiles/file/moloziduvebir.pdfIn PDF document text
- https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16098803a3ddb0---73160077244.pdfIn PDF document text
- http://mountcalvary76.com/clients/9/90/9062e1c9f2360b2cedac6e2854879500/File/dexebal.pdfIn PDF document text
- http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a4afb9c34df---91424929239.pdfIn PDF document text
- https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/aa358f53e8ae90f1119a8c856bb3af8c/352819629.pdfIn PDF document text
- http://anhbanglaw.com/userfiles/file/jubowav.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=book+drawing+easy+for+kidsPDF 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_off0000e851.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE851	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010068.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10068	10732 bytes
SHA-256: `8c07ea65136160fbdcf2ae740df1105fc196528683ae493fbb9a853096f5bec0`
`font_02_sfnt_off00011915.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11915	17636 bytes
SHA-256: `8d72a9852e334bab8a746d4006ca702977796792f1b3931259d6e0b1337c26d5`

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