PDF malware analysis — malicious · 73d34d57f2a0ccc2

MALICIOUS

PDF

79.7 KB Created: 2021-09-18 02:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: e37fbeb9c6288d6ceca465087fa8edfe SHA-1: 1e7ef2454a227c585d115cb57848d91f66a8f126 SHA-256: 73d34d57f2a0ccc286de47ad5a1bbf62df5144d724b64721a7867fee16560b2b

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript, indicating an attempt to execute code. The document also functions as a link farm, directing users to numerous external URLs, one of which is specifically designed to redirect based on a 'utm_term' parameter, suggesting a phishing or malware distribution lure. The presence of embedded JavaScript and external links strongly suggests an attempt to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9981

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://medvor.ru/uplcv?utm_term=best+apps+to+record+phone+calls+android PDF link annotation
- http://xn--2e0b95unoa536adofm5h.com/userfiles/file/82352852332.pdfIn PDF document text
- https://profession-your-dr.com/uploads/files/202109122302229379.pdfIn PDF document text
- http://dgjst.com/upfile/file/duzejepuwidofa.pdfIn PDF document text
- https://architektor.ru/uploads/file/wikemosoxarej.pdfIn PDF document text
- https://sharedsynergy.com/userfiles/file/28474747285.pdfIn PDF document text
- https://auto-rujo.com/images-editor/file/64311108580.pdfIn PDF document text
- https://ibshospitals.com/userfiles/file/65192118108.pdfIn PDF document text
- http://kagoshimakojintaxi.com/userfiles/file/2653471170.pdfIn PDF document text
- https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/161413d5babe76---17700457811.pdfIn PDF document text
- http://portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/molemejubilepasulejaluk.pdfIn PDF document text
- http://www.darvidproperty.com/news/file/22202601560.pdfIn PDF document text
- http://antitumor.org/filespath/files/20210906075852.pdfIn PDF document text
- http://giovanniseneca.eu/userfiles/files/nadusozujopekonin.pdfIn PDF document text
- http://hanarotalk.com/userfiles/file///84707384747.pdfIn PDF document text
- http://skpizzasubs.com/uploads/files/30889499729.pdfIn PDF document text
- https://argekaucuk.com/nbg/upload/files/ruwuboteruna.pdfIn PDF document text
- https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/53438290842.pdfIn PDF document text
- http://cen7dias.es/userfiles/files/fokitawilaruvoz.pdfIn PDF document text
- http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/68a333a7aedf19fad3bc1e6beec15a46/51813780926.pdfIn PDF document text
- https://ourcampuswindow.com/ckfinder/userfiles/files/50125551659.pdfIn PDF document text
- http://ahknchem.com/upload/files/juxewotadokugop.pdfIn PDF document text
- http://anpharma.net/upload/files/kivavizigututijikawam.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_off0000d5f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD5F0	16484 bytes
SHA-256: `3439a511e4e07a8a1b5f8c0d229dcd64a1eed0afee91942a288245784d70d177`
`font_01_sfnt_off00010092.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10092	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000118a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x118A9	10664 bytes
SHA-256: `1ce7884c64132dd741d0758bf5ad44eef1512e1b056c0a0183ac933a51e9472b`

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