PDF malware analysis — malicious · 8f110709c4aa6f4e

MALICIOUS

PDF

80.7 KB Created: 2021-09-12 20:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: e059d36faab051d8d50ccfdf84630520 SHA-1: 2d19f0ab060dd2fb5eaddbbfab8312c5aa129c92 SHA-256: 8f110709c4aa6f4ec63c05e29aafe42a179217687f9caa860cd4933b2e58c4e0

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, often involving JavaScript for obfuscation or execution.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

Heuristics 5

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.
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://oniceh.ru/uplcv?utm_term=ludo+watch+online+free PDF link annotation
- https://nguoixunghekiev.vn/userfiles/file/nekarokod.pdfIn PDF document text
- http://jatyn.cn/upfiles/202109/file/1631444293.pdfIn PDF document text
- http://www.firstpages.eu/app/webroot/files/userfiles/files/luzejavaxebelujukoxore.pdfIn PDF document text
- https://deltarents.com/upload/ckfinder/files/48679719728.pdfIn PDF document text
- http://psychologkmalinowska.pl/ckfinder/userfiles/files/lejepaduzapipukapimubub.pdfIn PDF document text
- http://cosmik-kinoteatr.ru/sadm_files/rijuriwowobejewibepe.pdfIn PDF document text
- http://appinaris.net/ckfinder/userfiles/publics/files/3943845950.pdfIn PDF document text
- https://tiemhoahaibara.com/data/dulieu/files/5006206283.pdfIn PDF document text
- http://patrick-vallot.com/upload/files/53490574664.pdfIn PDF document text
- http://barcelonasixtytwo.com/userfiles/file/60658602537.pdfIn PDF document text
- https://alexandrapanayotou.com/web/images/static/file/13716126538.pdfIn PDF document text
- https://cemb.ca/upload/editor/file/6286653468.pdfIn PDF document text
- https://www.alapan.org/fckimages/file/saxajegemarenidabapud.pdfIn PDF document text
- http://www.tecnologycenter.com/admin/uploaded/fck/file/98350923875.pdfIn PDF document text
- https://cncunse.com/d/files/jobabi.pdfIn PDF document text
- https://shunnasato.com/99302999248.pdfIn PDF document text
- https://yoimart.com/upload/file/20210906074529.pdfIn PDF document text
- http://bakoca.hu/files/file/xumogixez.pdfIn PDF document text
- http://onroerendgoedindex.nl/images/uploads/fixemefizuv.pdfIn PDF document text
- http://mh-gartengestaltung.de/userfiles/file/92209658792.pdfIn PDF document text
- http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8e9a9e929---rogelevuritozupoverexab.pdfIn PDF document text
- https://anukulagrotech.com/ci/userfiles/files/kajiwiputofelameko.pdfIn PDF document text
- https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16139ea05d53e2---wibilade.pdfIn PDF document text
- http://studioarchterreni.it/userfiles/files/dezalip.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_off0000d757.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD757	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ef6e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF6E	10548 bytes
SHA-256: `4c90a743619cd787f8d3a5ca199c4d8de051cb4c089a5122558f06aa254a8890`
`font_02_sfnt_off00010762.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10762	17904 bytes
SHA-256: `09811672320a4c39fa9c05d0da3c6621555bb0504f230cacdadb7c41ba5136f5`

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