PDF malware analysis — malicious · 2c762e53d06e144f

MALICIOUS

PDF

70.6 KB Created: 2021-09-02 08:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 9e8e2d1fa752f6d61dbf1eaf68baeb38 SHA-1: 4327c089e410f418462aef84779a1e1b4563249c SHA-256: 2c762e53d06e144fd5ff04ca497df20dce9024899865b0284dda1da838a4d542

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF document that exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised websites. The presence of ClamAV detection and ML classifier flagging strongly indicates malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.7514

Heuristics 5

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
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=basic+principles+and+calculations+in+chemical+engineering+7th+edition+solutions+pdf PDF link annotation
- https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/mhodhi8ga56v5tbcbtqbp6qq53/kufikekujalo.pdfIn PDF document text
- https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/008c7fbbbc1f5b8b6cb7a7d2082ee6cf/21466458614.pdfIn PDF document text
- https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b286a244a8---29896731953.pdfIn PDF document text
- https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/44c38b70eb811ba7a8e698ef3c9f2546/46441289123.pdfIn PDF document text
- http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612da22923d2c---rinaloguginoxete.pdfIn PDF document text
- https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79f72dd078---96726543417.pdfIn PDF document text
- http://www.ecvbrass.ch/user/web/file/nololevurasujabokimunoj.pdfIn PDF document text
- https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/o7mdv0ogk98bqr2v5rs8nel3nu/19072212866.pdfIn PDF document text
- http://fusiongrup.ro/userfiles/file/pefifugodefopodoz.pdfIn PDF document text
- https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/d172d91b93c01480f2bc8108383dcf53/78246773405.pdfIn PDF document text
- http://geobrofab.com/clients/d/da/da7cd3953015cd63472398095fc1fcdd/File/galatokomog.pdfIn PDF document text
- http://karinameal.ru/imgdish/files/tevolukopona.pdfIn PDF document text
- http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/47972fc03bfd3c498b1f327413d82891/tavepufosevesezunoboxo.pdfIn PDF document text
- https://satbietthu.com/luutru/files/62864650561.pdfIn PDF document text
- http://poney-club-romilly-aigre28.fr/userfiles/file/19823288599.pdfIn PDF document text
- http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e42e0ea8c---62265403354.pdfIn PDF document text
- http://toyotacri.com/userfiles/files/kerumepananigobojevonu.pdfIn PDF document text
- https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2f9c361ac---90337735019.pdfIn PDF document text
- http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/d5ee678ebcd583b6066893b15ff90e0b/biravelivi.pdfIn PDF document text
- https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074392a7fe3b---46194217955.pdfIn PDF document text
- https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd55e403bb---45242400080.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_off0000d983.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD983	11268 bytes
SHA-256: `1fa130b2440175f2ead6c27b91e981ac71fb2507b72ed690438f926ddee1e6f1`
`font_01_sfnt_off0000f3a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3A5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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