PDF malware analysis — malicious · 210384c9cd0e255e

MALICIOUS

PDF

71.6 KB Created: 2021-10-01 21:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20

MD5: f92e6408f616d30377d2d78ffcb9e5ab SHA-1: 3f2c67a6fadc6ddb5f0af49da70e3803ac1d2ddd SHA-256: 210384c9cd0e255ee0fdf3166bdfacf1ac14e19ca53c54f8e37207d0838190d5

134 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 disposable domains and are part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting the user to these malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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
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://fuoriscena.eu/file/9514023409.pdf In PDF document text
- http://greece-ex.com/images/blog/file/jumufavodudeseze.pdfIn PDF document text
- https://aquaprosmart.com/userfiles/files/puxezakovodirewagamab.pdfIn PDF document text
- https://olgunbey.com/upload/ckfinder/files/72354034113.pdfIn PDF document text
- http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614601f00fe44---lapex.pdfIn PDF document text
- https://srinivasagroup.com/ci/userfiles/files/69577106252.pdfIn PDF document text
- http://sllight.ru/design/img/upload/file/41059757525.pdfIn PDF document text
- http://pho32shabu.com/uploads/files/62531492342.pdfIn PDF document text
- https://chatsystem.site/js/ckfinder/userfiles/files/84061163220.pdfIn PDF document text
- http://zxpgw.com/userfiles/file/10060503748.pdfIn PDF document text
- http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/49270676659.pdfIn PDF document text
- http://pokebarslo.com/uploads/files/gumilozupipanisiwur.pdfIn PDF document text
- https://atlantidegattico.it/file/98099725150.pdfIn PDF document text
- https://red-adlay.com/upload/files/35530570915.pdfIn PDF document text
- http://huzatfokozo.hu/editor_up/30349675017.pdfIn PDF document text
- https://aqua2go.pl/galeria/file/zekawenosus.pdfIn PDF document text
- http://orthopaede4you.de/userfiles/file/kapazegixivifabine.pdfIn PDF document text
- http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f046cc1019---dinuxilozegevemivuwojami.pdfIn PDF document text
- http://arunimaflavours.com/userfiles/file/fafaloxenizapitipozeka.pdfIn PDF document text
- https://dursunguney.com/userfiles/files/nemiwisoluxolikekubob.pdfIn PDF document text
- https://fanaf.com/article_ressources/file/29727407444.pdfIn PDF document text
- http://bayanairag.com/uploads/userfiles/files/55000443714.pdfIn PDF document text
- http://duet-czluchow.pl/userfiles/file/wikezedelejile.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=sky+high+movie+online+freePDF link annotation
- http://cluster006.ovh.net/~greeters/namur/ckfinder/userfiles/files/65365297043.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_off0000b36b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB36B	17472 bytes
SHA-256: `96c5cd3c988be4fc01b74376a071f4c4d4faac4ca0736372b607943d5906865e`
`font_01_sfnt_off0000e06e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE06E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f885.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF885	10580 bytes
SHA-256: `e59dd80cf08dacf2ac6620682f522c2089329b52a41d46b30a45b4210995088b`

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