PDF malware analysis — malicious · 600fbd244c9363c2

MALICIOUS

PDF

80.0 KB Created: 2021-09-20 01:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: dc2f1f5a94bcfb6005f848d81461ca71 SHA-1: 00f21634bde86eb4e6bd1bd344a0caec0912aaa6 SHA-256: 600fbd244c9363c20e91cacadb4290740de9692c204eda809b99e0620111e0f7

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects the user to one of the numerous external URLs, which are part of a link farm designed for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://infrive.ru/uplcv?utm_term=android+tv+mp4 PDF link annotation
- https://n-tlg.com/files/file/45045667846.pdfIn PDF document text
- https://wrd13.com/force/file/64752572163.pdfIn PDF document text
- https://hamayeshniroo.com/shop/file/limikinefetutum.pdfIn PDF document text
- http://wwpokebar.com/uploads/files/91280564845.pdfIn PDF document text
- http://sh-songshi.com/admin/upimg/file///99897845323.pdfIn PDF document text
- http://stroytehcentr.ru/images/file/suveme.pdfIn PDF document text
- https://taiwancy.com/app/webroot/userfiles/files/nigofodilukalab.pdfIn PDF document text
- https://biothiennam.com/media/ftp/file/rufawifakupobuvoxupafil.pdfIn PDF document text
- http://studiozammuner.eu/userfiles/files/58345629748.pdfIn PDF document text
- https://fceresources.com/ckfinder/userfiles/files/gapavaxenedurur.pdfIn PDF document text
- http://enotecagaribaldi.it/userfiles/files/dekotapewofewiwigakifuful.pdfIn PDF document text
- http://www.saaegfpolis.org.br/ckfinder/userfiles/files/sulipuzome.pdfIn PDF document text
- https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/a196b67ee07945b9262740d7500b3df7/bazitawubifumagalavupizi.pdfIn PDF document text
- http://vivaibonomo.it/userfiles/files/tirerofasanazaselujobawu.pdfIn PDF document text
- http://rubivina.com/Images_upload/files/63109062255.pdfIn PDF document text
- http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/010906273995.pdfIn PDF document text
- http://eco-versute.com/app/webroot/ckfinder/userfiles/files/famerewoxafidibofedofagu.pdfIn PDF document text
- https://owop.challengersports.com/userfiles/files/dutokexorijun.pdfIn PDF document text
- https://scout-educationguide.com/userfiles/file/22849458405.pdfIn PDF document text
- http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/devakuzas.pdfIn PDF document text
- http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145d72be5b0e---14582393898.pdfIn PDF document text
- https://hunglivet.com/uploads/files/202109121257394547.pdfIn PDF document text
- http://fantacyhandicraft.com/userfiles/file/raruzaxidovugeti.pdfIn PDF document text
- https://elearning-chemistry.ro/userfiles/file/kofugewifewavolofixolelu.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_off0000d653.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD653	17576 bytes
SHA-256: `d4e5158a32dd283e8861a1aeb1f8c5c797f1ea2797f268dc2fce6af87a3ca874`
`font_01_sfnt_off000103a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103A7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011bbe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11BBE	10168 bytes
SHA-256: `ab062fe6efd30af70ac71266fbf7933a343179144499ee616a5163caeea9b5eb`

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