PDF malware analysis — malicious · 29d0674da40324e1

MALICIOUS

PDF

75.5 KB Created: 2021-09-11 18:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 285739bfe28861a5d932023901538358 SHA-1: 95476cab3d10d4881a1f2546feb492fd59a2602e SHA-256: 29d0674da40324e1f17c831d83f6785a2160cf09ed7ef2c7e9c08e433f7c5e50

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm for SEO poisoning or phishing. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 7

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.
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
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://datajournonepal.org/files/vofagojenuvulelib.pdf In PDF document text
- http://boletos.luzservicos.com/ckfinder/userfiles/files/vudamoxozasagerat.pdfIn PDF document text
- http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb25292710---75901878716.pdfIn PDF document text
- http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/fobanipofebob.pdfIn PDF document text
- https://n-tlg.com/files/file/1599758089.pdfIn PDF document text
- https://gloriamus.org/Uploads/userfiles/files/tunusakubukedekotaveg.pdfIn PDF document text
- http://fygl.net/uploads/file/101058348446.pdfIn PDF document text
- http://kitpaisal.com/mypicture/file/kazefurufigapuvu.pdfIn PDF document text
- https://mandarinusa.com/userfiles/file/1631215412.pdfIn PDF document text
- http://eventechsite.com/files/files/gatupawe.pdfIn PDF document text
- https://sanmuabancongty.vn/images/content/files/42563709594.pdfIn PDF document text
- http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/161399918f0962---bufewerovajaku.pdfIn PDF document text
- http://studiofagiani.eu/userfiles/files/71194297654.pdfIn PDF document text
- https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/5d4ded7d5b18e0e3421a1bc4d72b6594/wezipesusaduxo.pdfIn PDF document text
- http://www.barbazan-debat.fr/ckfinder/userfiles/files/83954373405.pdfIn PDF document text
- http://jikaramen.com/uploads/files/75337174588.pdfIn PDF document text
- http://manchetenewsms.com.br/ckfinder/userfiles/files/ludomed.pdfIn PDF document text
- http://salwex.hu/file/kubopajadu.pdfIn PDF document text
- http://baovecongtruong.com/upload/files/16306520864.pdfIn PDF document text
- https://dusunceokulu.net/resimler/files/62392570465.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135cc3332a4c---97800963889.pdfIn PDF document text
- http://xn--9i1b14lwsg1seumdzsx.com/upload/fckeditor/file/55920782790.pdfIn PDF document text
- http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16136f676110d0---jigiwavofapi.pdfIn PDF document text
- http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613512082f175---zarekogenuma.pdfIn PDF document text
- http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86190831356.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=queen+of+hearts+online+moviePDF 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_off0000c221.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC221	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000da38.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA38	10704 bytes
SHA-256: `e547fb56a6d9347d2226de430d419dda0c625f69420caa0c12ad75cdd46ee17a`
`font_02_sfnt_off0000f2b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2B2	17848 bytes
SHA-256: `1f7487387e685a1a7a1757961500dec3e22d7ef839ba79b0382471d2701602b3`

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