PDF malware analysis — malicious · b05b0c1b75137154

MALICIOUS

PDF

71.0 KB Created: 2021-09-24 20:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 230cdebfd779ce3426616d2b71becd7d SHA-1: 7755bd692de4e91c071ebe6db8103610d17d776d SHA-256: b05b0c1b7513715489777c8ad7f886849be3b65b2cfff0d4116838fcaf21547d

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to malicious content or phishing sites. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggests these URLs are part of a link farm designed for SEO manipulation or to obscure the final destination.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

Heuristics 5

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.
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://phuongdonggolf.vn/app/webroot/uploads/files/56627786555.pdf In PDF document text
- https://www.bosingels.nl/ckfinder/userfiles/files/wajutukemitirov.pdfIn PDF document text
- http://shmgec.com/Uploadfiles/files/31348020651.pdfIn PDF document text
- http://tangneylaw.com/admin/images/file/fozirusox.pdfIn PDF document text
- http://pekingtogo.com/uploads/files/dagosuwapubedagasata.pdfIn PDF document text
- https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16136917484958---1248278169.pdfIn PDF document text
- http://csc010.com/userfiles/file/20210916110529_ig43ds.pdfIn PDF document text
- http://strap.sk/uploads/files/38556522193.pdfIn PDF document text
- http://www.instalacionescueto.com/nueva/ckfinder/userfiles/files/88669717814.pdfIn PDF document text
- https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614424652fcd4---11337031430.pdfIn PDF document text
- http://sgrdinstitutionspandher.org/sgrd/userfiles/file/voraxizexun.pdfIn PDF document text
- http://ikra-ekb.ru/files/fckeditor/file/pewixejoguwajoboxow.pdfIn PDF document text
- https://condominiovillage.com/userfiles/file/fororaranewef.pdfIn PDF document text
- https://alemarferries.alemarsnp.gr/ckfinder/userfiles/files/21468422112.pdfIn PDF document text
- https://asmitahrgroup.com/ckfinder/userfiles/files/43975918699.pdfIn PDF document text
- https://acryl-bg.com/userfiles/file/terevirarujesijolujixi.pdfIn PDF document text
- http://ecoaga.com/documentos/file/67736980451.pdfIn PDF document text
- https://arbormaster.net/uploads/files/wifofadidisojutakedu.pdfIn PDF document text
- http://goddesshair.net/upload/users/files/ririvetedisoruzerotilet.pdfIn PDF document text
- https://momsgardenfoods.com/ckfinder/userfiles/files/93142040406.pdfIn PDF document text
- https://evrenmentese.com/upload/ckfinder/files/xamepapunoxer.pdfIn PDF document text
- http://gzmzwl.com/Uploadfiles/files/27607636935.pdfIn PDF document text
- http://mascotdd.com/file_media/file_image/file/27756193326.pdfIn PDF document text
- http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210917233133.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=mystery+dungeon+pokemon+gamesPDF 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_off0000b3dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB3DC	16204 bytes
SHA-256: `dc18b86c191e7cb153d835fcd530197dfc310d0905befecd80544f7b371de8f3`
`font_01_sfnt_off0000dd4f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD4F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f566.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF566	10896 bytes
SHA-256: `42fe539a5c1906083195314ac5c0cc37f6f492ce72da611b41cae0c3d4f5bab5`

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