PDF malware analysis — malicious · d9055d99e6e32c93

MALICIOUS

PDF

68.3 KB Created: 2021-09-30 18:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: 3db03a1b03178f92b0d2ed74f562b00a SHA-1: b76b4de2e8b6d99837186f0678453b26eabb2463 SHA-256: d9055d99e6e32c936e7880b9802d167bca2e35ee81f51797da55357459d79d80

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm on disposable hosting, containing numerous external URIs pointing to various domains. The document body is heavily obfuscated and unreadable, suggesting it is designed to obscure its malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

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=apk+zombie+age+2 PDF link annotation
- http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/94643223644.pdfIn PDF document text
- http://dealershop.es/userfiles/file/49692111623.pdfIn PDF document text
- https://beautifulhairstore.com/upload/files/32011625906.pdfIn PDF document text
- https://szaniterplaza.hu/ckfinder/userfiles/files/peletovoxavoxijipawul.pdfIn PDF document text
- https://actsonics.com/uploads/files/202109111435286753.pdfIn PDF document text
- http://boletos.luzservicos.com/ckfinder/userfiles/files/48673280988.pdfIn PDF document text
- http://ping-property.com/user_img/files/91021014468.pdfIn PDF document text
- http://buyyoutubecomments.com/ci/userfiles/files/4451654316.pdfIn PDF document text
- http://quangcaovuanh.com/vietkiendo/upload/file/naduguvedes.pdfIn PDF document text
- https://shinaltd.ru/images/file/pevobosaxi.pdfIn PDF document text
- https://myclubowners.com/userfiles/files/luwikakuwaxefisuxi.pdfIn PDF document text
- https://glozor.com/userfiles/file/xupas.pdfIn PDF document text
- http://www.accl-calibration.com/login/ckfinder/userfiles/files/robijimoranejemaxega.pdfIn PDF document text
- https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b38104f63---modobifevaripoduviko.pdfIn PDF document text
- https://www.aukuras.org/ckfinder/userfiles/files/jadelewelefikeguje.pdfIn PDF document text
- https://piauiaqui.com/ckfinder/files/jojamowamosujaf.pdfIn PDF document text
- http://phuvuongcorp.com/luutru/files/gitejuwotizusapo.pdfIn PDF document text
- http://mexxeopaint.com/upload/files/24436232678.pdfIn PDF document text
- http://buffagiuseppeinfissi.com/userfiles/files/39362490745.pdfIn PDF document text
- http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/473456cad7c24c3c8b4cfec99b67aca7/xakuxenufosagivuronaf.pdfIn PDF document text
- http://otpetye.com/images/shared/file/65660227200.pdfIn PDF document text
- http://tomaszfilipczak.pl/userfiles/file/motalumetoxojakotubap.pdfIn PDF document text
- http://cornucopiafrederick.com/uploads/files/ribabepufawo.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_off0000b07f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB07F	14256 bytes
SHA-256: `337c05c2a6fe0fd9c615589afb712f5081f7d4a48c28e112b2b5ad24862d69d7`
`font_01_sfnt_off0000d418.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD418	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000ec2f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC2F	10472 bytes
SHA-256: `8baa2efa51571f08e1dabe1e398a6f46eb081b647ff19dbbe6e74ab39fb9b265`

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