PDF malware analysis — malicious · d4bf9b1961e590d4

MALICIOUS

PDF

69.9 KB Created: 2021-09-26 14:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 30e6e9a1653ab3f104472a6909585419 SHA-1: f272ce6714ecfdfcc1c616a1ae3f5cafb3656132 SHA-256: d4bf9b1961e590d4cc5dcb4ef95e2551f48716c52beac7b6ed3feff495248bdd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body is heavily obfuscated and appears to be generated content rather than user-readable text.

Machine Learning

Nyx PDF Classifier malicious score 0.9837

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://medvor.ru/uplcv?utm_term=watch+seal+team+season+3+online+free PDF link annotation
- http://yourhealthyanswer.com/ckfinder/userfiles/files/luburiboxez.pdfIn PDF document text
- http://anthonyvienna.com/sites/default/files/file/76300776110.pdfIn PDF document text
- http://sportingclubalbinia.eu/userfiles/files/jiguzusekopute.pdfIn PDF document text
- https://alstar.uz/images/shared/file/69956800718.pdfIn PDF document text
- https://ddtoyz.com/ckfinder/userfiles/files/36386596174.pdfIn PDF document text
- https://exam11.menapoint.com/app/webroot/upload/files/18784060957.pdfIn PDF document text
- http://gutachterbewertung.de/userfiles/file/duvuwetola.pdfIn PDF document text
- http://zartmobilia.com/userfiles/file/20210916210231.pdfIn PDF document text
- http://enewind.com/pliki/file/84605007294.pdfIn PDF document text
- http://libron.pl/fckupload/assets/file/winivagupoleza.pdfIn PDF document text
- http://ordineveterinarivenezia.eu/userfiles/files/18549117415.pdfIn PDF document text
- http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1613a89479e20f---54563864146.pdfIn PDF document text
- https://pasarantogel.com/contents/files/23515870640.pdfIn PDF document text
- https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141e878a95e8---12313300634.pdfIn PDF document text
- https://bomberosdenavarra.com/userfiles_nexo/files/43814893119.pdfIn PDF document text
- https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/f68rbpp98bhqe0bmuop7jdd6cq/vatex.pdfIn PDF document text
- http://lsbwg.com/ckfinder/userfiles/files/20210921/0142545614.pdfIn PDF document text
- http://csc0851.com/userfiles/file/20210917105456_r95oj1.pdfIn PDF document text
- https://lazerom.pro/media/file/89901459033.pdfIn PDF document text
- http://jtravel.clickis.kr/FileData/ckfinder/files/20210904_7E0A6A72C114E9A6.pdfIn PDF document text
- http://kartywspomnien.pl/uploads/assets/file/sarazuvewovepi.pdfIn PDF document text
- http://adabaskimerkezi.com/upload/file/gizasawudidurizojasuzezew.pdfIn PDF document text
- http://verzorgingsindex.nl/images/uploads/manizajikudin.pdfIn PDF document text
- https://livewireeventz.com/userfiles/file/33568067407.pdfIn PDF document text
- https://nbretail.com.vn/ckfinder/userfiles/files/84640814688.pdfIn PDF document text
- https://homecareangels.ca/files/files/files/metil.pdfIn PDF document text
- http://www.museopizarra.com/ckfinder/userfiles/files/75695418306.pdfIn PDF document text
- http://vibrobeton.by/pics/files/49367606930.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_off0000b2ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB2CA	15124 bytes
SHA-256: `dc0a475685e649c6f7841312d47afea0e5f4eb5583832db72782ae7c9f24f856`
`font_01_sfnt_off0000d8c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8C0	10764 bytes
SHA-256: `1755e997f6479cec2805f3bb5214978a91095b3654e21bfb9b4e2144d10ea6e8`
`font_02_sfnt_off0000f168.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF168	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.