PDF malware analysis — malicious · ee314833c6b5a924

MALICIOUS

PDF

87.3 KB Created: 2021-09-16 08:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 3c643f7c0a5dddbbc8f20f47f4a9b8ba SHA-1: 9d8d61c345bcb6f273f7b07b810c616f41ccd836 SHA-256: ee314833c6b5a92412660e96b5435f4e73780e53517dd5476c80c97b27a6b5b4

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The presence of embedded JavaScript and a high number of external URLs, many pointing to disposable domains, strongly indicates a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of this PDF. The embedded JavaScript likely facilitates the redirection to malicious sites or the download of further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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
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://pixomot.ru/uplcv?utm_term=watch+movies+free+online+2021 PDF link annotation
- http://sangtaoad.com/uploads/userfiles/file/daxadakozoneradinelekezo.pdfIn PDF document text
- http://baraanduliaptti.org/userfiles/file/76597512387.pdfIn PDF document text
- http://twtime.com/uploads/files/202109040027329285.pdfIn PDF document text
- http://praguynakorn.com/praguynakorn/picture/datapro/files/lozevotiwi.pdfIn PDF document text
- https://dongciao.com/uploads/files/202109010238373292.pdfIn PDF document text
- https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/njpqfsc61cic4sbcm7pibffm93/fawavekajufejojaxebopif.pdfIn PDF document text
- http://xszhuhai.com/uploadfiles/files/77149788047.pdfIn PDF document text
- http://eot.mn/uploads/userfiles/files/34159902349.pdfIn PDF document text
- https://getracemirates.com/userfiles/files/96195529503.pdfIn PDF document text
- https://www.db-ynox.fr/ckfinder/userfiles/files/podisemalefesesal.pdfIn PDF document text
- http://progettocecinacuore.it/writable/public/userfiles/file/79887951614.pdfIn PDF document text
- http://zamdq.com/filespath/files/20210912191144.pdfIn PDF document text
- http://sakem.org/userfiles/files/gefadufulemufo.pdfIn PDF document text
- https://stijsr.com/userfiles/file/49361058825.pdfIn PDF document text
- http://alatheir.com/atheirwsfiles/file/jakigavamuzid.pdfIn PDF document text
- https://braveathlete.net/geektic/files/30549226635.pdfIn PDF document text
- http://tatishev.ru/admin/ckfinder/userfiles/files/12385623285.pdfIn PDF document text
- http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613467a73f07f---6609854982.pdfIn PDF document text
- http://krukewittfarms.com/userfiles/file/pebado.pdfIn PDF document text
- https://www.shamshabaddiocese.org/files/js/ckfinder/userfiles/files/dudagorajepu.pdfIn PDF document text
- https://k85shj16h-561lt.com/contents/files/xunalejulumofefudele.pdfIn PDF document text
- https://nomortiga.com/contents/files/61718500062.pdfIn PDF document text
- https://computerzone.pk/file/xezerafifenugasama.pdfIn PDF document text
- http://market-oborudovanie.ru/upload/file/fenopepoxosamaxupot.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_off0000eccc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECCC	18916 bytes
SHA-256: `1cbe29c28f64558b0fa2a1d30736f25faf78e28c5741bb22a5e65a31443f37b8`
`font_01_sfnt_off00011e43.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E43	10956 bytes
SHA-256: `7a2e2354c1bc03620d8b13c3fde7fe40cf935ebab432e18a988f21a35c183d8e`
`font_02_sfnt_off0001379e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1379E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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