PDF malware analysis — malicious · 82759bb9396f9e1b

MALICIOUS

PDF

88.3 KB Created: 2021-07-06 13:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04

MD5: 6f69893449075cd95430ca284d2c58b9 SHA-1: d4fe0e82f9b8ab09e37bc8967f917f0558b1313d SHA-256: 82759bb9396f9e1b00bb1c23ebda1dceee0dac79a9a65778c492fff994fcf6c7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, indicating it functions as a link farm. ClamAV detected this file as Pdf.Phishing.Trojan, and the ML classifier also flagged it as malicious. The embedded URLs suggest a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

Heuristics 6

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
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://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/qb7h8mt9trr2gjifm9at729uvi/3647457401.pdf In PDF document text
- https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/a0b875d74e1608e329b685fe4e90445b/5739328667.pdfIn PDF document text
- https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/7daa8614d48126fa35b629c5cc9b3013/kuxux.pdfIn PDF document text
- http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16090d11fd3cfd---mixusawasurawaviwopug.pdfIn PDF document text
- http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5f32ebf646---32208261037.pdfIn PDF document text
- https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/dofadojizivo.pdfIn PDF document text
- https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d1b88b2e9---zosebukukij.pdfIn PDF document text
- http://safeabortionnepal.com/userfiles/file/buludagaf.pdfIn PDF document text
- https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085e05368dc7---goradudux.pdfIn PDF document text
- http://agiusfuneraldirectors.com/files/file/33581266282.pdfIn PDF document text
- http://asianaccounting.com/admin/fckeditor/userfiles/file/xunimorov.pdfIn PDF document text
- https://perfecthospital.org/FCKeditor/file/zeriniwu.pdfIn PDF document text
- http://www.monts.sk/upload_images/file/48206337104.pdfIn PDF document text
- https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a7516208a9e---72720277127.pdfIn PDF document text
- https://superchills.com/userfiles/file/pepedifevakewugez.pdfIn PDF document text
- http://buildinggodskingdom.com/webcms/file/mugikigifuxulu.pdfIn PDF document text
- http://johnsonsdynastyincfamilyassociation.com/clients/10108/File/36751872692.pdfIn PDF document text
- https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850b74a8d0d---49350372664.pdfIn PDF document text
- https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf2cd576fe---94569775124.pdfIn PDF document text
- https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/b18f03de0ed2eb8539c8f063fefe89cc/sugadirizarubine.pdfIn PDF document text
- http://twxcd.com/img-aim/files/ravujebos.pdfIn PDF document text
- https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b06a8cb3f---22709818114.pdfIn PDF document text
- https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/26d6f41d452192ace2b9d924f31f063a/51751989159.pdfIn PDF document text
- https://ludbaegitim.com/calisma2/files/uploads/pojiwusobibite.pdfIn PDF document text
- https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/312c0eb50d7f815353ebb859b7c898dd/30751584961.pdfIn PDF document text
- https://doanhnghiepvietnam.org/img_duhoc/files/kiwakebitilawogi.pdfIn PDF document text
- http://rayanchem.com/d/files/zegedilewaxunuzuves.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=modern+forehand+slow+motionPDF 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_off0000f759.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF759	16872 bytes
SHA-256: `bd24539889d0e378a3239dc8fe6cf5827cd5863d9899973f01d17e38e91e082a`
`font_01_sfnt_off0001235c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1235C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013b73.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13B73	10696 bytes
SHA-256: `23a3ad621199f3808341cec9b890f09a64731f7643469c32a0ffdf7c691be8d3`

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