PDF malware analysis — malicious · 9eacd0e352383467

MALICIOUS

PDF

83.1 KB Created: 2021-09-12 19:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 2274cf94e1f8960a9ce03a4dcbf5e246 SHA-1: 444e6ad64cc8205826900c916f4ef3b943848266 SHA-256: 9eacd0e35238346700744197fedc910944285447f8d12ca2b93f065e96aa1b7c

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for executing malicious code. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects the user to one of the numerous external URLs found in the document, potentially for phishing or to download further malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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 http://tz5168.com/uploadfile/image/2021/09/01/file/20210901_072025_167.pdf In PDF document text
- https://reaga.net/js/ckfinder/userfiles/files/71943401339.pdfIn PDF document text
- http://traktorpulling.de/ablage/userfiles/files/74342898028.pdfIn PDF document text
- https://jackinthegym.com/uploads/files/202109010837582123.pdfIn PDF document text
- http://thevisionkharj.com/userfiles/files/64338236140.pdfIn PDF document text
- http://meubelenindex.nl/images/uploads/90341594186.pdfIn PDF document text
- https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613116e30b614---nugesu.pdfIn PDF document text
- http://35ct1.com/images/ckImageFiles/files/99140633321.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d794ed0b0a26df0963ad96c58cde9974/35759448109.pdfIn PDF document text
- http://clearspace-design.com/CKEdit/upload/files/dabofuvikakigom.pdfIn PDF document text
- http://fivelscope.net/fckimages/89839988998.pdfIn PDF document text
- http://dansecyr.ca/pdf/file/56323147836.pdfIn PDF document text
- http://www.stsmcc.org/www/js/ckfinder/userfiles/files/lebojiborovod.pdfIn PDF document text
- https://alquimia.in/admin/fckeditor/editorfile/9488055748.pdfIn PDF document text
- http://espokebar.com/uploads/files/buxexemijowosirujakevolaj.pdfIn PDF document text
- https://cobaltinc.org/userfiles/file/10848132938.pdfIn PDF document text
- https://emons-verlag.com/testarea/cwsCMSlight/media/files/jisepirifokuzupaluxedevuk.pdfIn PDF document text
- http://tianlanip.com/filespath/files/20210905030202.pdfIn PDF document text
- https://carlojans.com/cms/file/11674748859.pdfIn PDF document text
- http://celcg.pl/uploaded/file/bajatazas.pdfIn PDF document text
- http://playoz.com/ckfinder/userfiles/files/fepadaponodeju.pdfIn PDF document text
- http://fanti-fitness.pl/uploads/assets/file/75913645761.pdfIn PDF document text
- http://formpart.com/upload/ckfinder/files/jofazunene.pdfIn PDF document text
- http://fpempresa.cen.es/userfiles/files/luxugibimewasesob.pdfIn PDF document text
- http://www.rafaellucenaehijos.com/ckfinder/userfiles/files/laropugebidixuxoxu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=minecraft+trial+download+for+androidPDF 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_off0000e4a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4A9	16560 bytes
SHA-256: `11efea0556683ca688bdf44417ccc462563026e847c9444ed6c8c7fea2750b59`
`font_01_sfnt_off00010f32.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F32	10380 bytes
SHA-256: `6fa17a8a515ce76dd4b1fcc9ca2bc6012572b6cea5943a46ce9c45d7410991e2`
`font_02_sfnt_off000126da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126DA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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