PDF malware analysis — malicious · a6ad9afdb3873152

MALICIOUS

PDF

76.2 KB Created: 2021-09-16 07:03:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 07f5ee829cd47f48399b84478354f591 SHA-1: ea63bc826047832a0167f7b9793aee536688a239 SHA-256: a6ad9afdb3873152bcbd5870c6ef49560ccd516d6048375fe5de2a0242525581

132 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to suspicious PDF files on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded JavaScript suggests an attempt to execute code, likely to redirect the user to a malicious site or download a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.7562

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://www.travelknowhowscotland.co.uk/assets/js/ckfinder/userfiles/files/55700244918.pdf In PDF document text
- https://pinyardim.com/calisma2/files/uploads/gowuvuvi.pdfIn PDF document text
- http://bettynblue.com/upload/fck_img/20210909/file/kekebivadenatinalitaden.pdfIn PDF document text
- http://stellarp.com/userfiles/files/wezemawanaximumuba.pdfIn PDF document text
- https://bor-diing.com/upload/files/taluvagojekixi.pdfIn PDF document text
- https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/gb046h3d6otrvlc822pljchsvu/tuzapujuramusegurukow.pdfIn PDF document text
- https://kemxoi.vn/app/webroot/files/images/pages/files/bixaguwizulibajiruv.pdfIn PDF document text
- https://mariapolis.net/ckfinder/userfiles/files/kasufikisinuzujixojemisop.pdfIn PDF document text
- http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/lejogifazelifajamokifumug.pdfIn PDF document text
- http://annabarons.lv/files/files/75329319444.pdfIn PDF document text
- http://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/9631656414.pdfIn PDF document text
- http://recrute.fr/files/files/57235729019.pdfIn PDF document text
- http://litho-and-co.fr/ckeditor/upload/files/23988477521.pdfIn PDF document text
- http://unseretochter.ch/images/file/98100510622.pdfIn PDF document text
- http://terezmisszio.eu/files/file/17870376196.pdfIn PDF document text
- http://bindashnews.com/userfiles/file/gulakuxekek.pdfIn PDF document text
- https://aluminiosarla.com/userfiles_arla/files/9654084415.pdfIn PDF document text
- http://poexali.org/static/image/_u/system/files/muvipigesawovelijunesidep.pdfIn PDF document text
- http://urparitet.ru/admin/ckfinder/userfiles/files/tumuma.pdfIn PDF document text
- http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613094ca9a7f5---87110135028.pdfIn PDF document text
- http://www.onlinenieuwsbriefversturen.nl/gebruikers/afbeeldingen/57683471678.pdfIn PDF document text
- http://modernplating.com/userfiles/file/zapixeni.pdfIn PDF document text
- http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/memavumuvekozudiw.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=watch+thor+ragnarok+full+movie+online+freePDF link annotation
- 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_off0000e424.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE424	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fc3b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC3B	10864 bytes
SHA-256: `71c9cedfa2bbe3a24289fd2ab3fe72b95401f5fed38bec6b2bc64929e880e3a2`

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