PDF malware analysis — malicious · 07c96a72cce06316

MALICIOUS

PDF

95.6 KB Created: 2021-08-04 19:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: a4fe1fe3cfdeee3533d7d4ff5f1e3b21 SHA-1: 3d73bbd1fe61c5c71713f2e87d421b25bb93f233 SHA-256: 07c96a72cce06316de099a4c2188a06eb860a87cff14a4e5f2275400808abb39

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 contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting it functions as a link farm for phishing or malware distribution. The presence of embedded URLs and the PDF structure itself point towards an attempt to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9928

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://nomylo.ru/uplcv?utm_term=atlas+de+sedimento+urinario PDF link annotation
- https://hgb.se/filer/file/modapevulaxujenunerepitol.pdfIn PDF document text
- http://zjhywt.com/images/upload/File/wovivijugapigututu.pdfIn PDF document text
- http://abwjefferson.com/uploads/files/58974453248.pdfIn PDF document text
- https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/fce6ef97da4401083f6a5148f81540aa/35824141412.pdfIn PDF document text
- https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ac2638f0e---gitixulefugalotuto.pdfIn PDF document text
- https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1b562b3d0---82502711666.pdfIn PDF document text
- https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/nrpnspkg6r08be76f2mkkdl4mv/93955379300.pdfIn PDF document text
- https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/517c32db2abec0ce287d404a987b82ef/84792386380.pdfIn PDF document text
- https://ceccarbotosani.ro/userfiles/file/lixijufisunumowif.pdfIn PDF document text
- http://ordinate-ltd.com/file_media/file_image/file/6601416367.pdfIn PDF document text
- http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/80800ab16174ec14bf9b775c8ef63fdf/duvuvowarubuwivasixarixu.pdfIn PDF document text
- https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97cbd5f06a---pisigu.pdfIn PDF document text
- http://warungmimpishio.com/contents//files/90974856483.pdfIn PDF document text
- http://bio86.fr/fichiers/zovomijevitizixofad.pdfIn PDF document text
- https://eberli-medical-supply.ch/userfiles/files/zagubuwekaxokanowuko.pdfIn PDF document text
- http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/vofutevuvozozirikevusape.pdfIn PDF document text
- http://tiszaladany.hu/upload/file/54080874613.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/f9s2t7vhob2mh5v829gpifiv40/10492686607.pdfIn PDF document text
- https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/ed4e583e1bd6e075bde3c8f67a4c31b0/83942380362.pdfIn PDF document text
- http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a591373ce20---70706411549.pdfIn PDF document text
- https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/n8tg2a9det9me8j82uep6kugme/5498204939.pdfIn PDF document text
- https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608417ae53044---22087935774.pdfIn PDF document text
- http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ff4b98536---3838961137.pdfIn PDF document text
- http://comp-art.ru/userfiles/file/xifov.pdfIn PDF document text
- http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c42bb3851ef---66951107270.pdfIn PDF document text
- https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082002a2a422---godaratofimen.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_off00010dd0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DD0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000125e2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125E2	19276 bytes
SHA-256: `ceb68ce25dc7b3c00f605c3cb9e61832cbca4126bb57559e167f4a932a1f564e`
`font_02_sfnt_off00015699.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15699	10488 bytes
SHA-256: `8f4090278b153bcd7318eb08eabf27f40dd5e05fd9cf8c7fdb914564ec605c87`

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