PDF malware analysis — malicious · 9e059ccae890f46d

MALICIOUS

PDF

72.3 KB Created: 2021-10-02 09:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02

MD5: 4b2b3129ff78ef18ddf63c597e412694 SHA-1: 2d4108bd13b5e04a0d37a7f5db0c92afa9b972ec SHA-256: 9e059ccae890f46d5060abf13fa5ec3889e6e417075f4f2be710052d989dd419

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://radekslodkiewicz.pl/files/file/58415967856.pdf In PDF document text
- http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16152df11de38c---69253238647.pdfIn PDF document text
- http://jessie.vn/images/ckeditor/files/puliworananepokugile.pdfIn PDF document text
- https://sandp-engineering.com/ckfinder/userfiles/files/pitametidifebof.pdfIn PDF document text
- http://climtech.com/files/files/48159266077.pdfIn PDF document text
- https://www.l-games.jp/js/ckfinder/userfiles/files/69421696892.pdfIn PDF document text
- https://mallncart.com/userfiles/files/nipowivasepasafufiv.pdfIn PDF document text
- https://malayalamfoundation.org/admin/my_files/file/91464344040.pdfIn PDF document text
- http://meghdoothsuzuki.com/uploads/74018718992.pdfIn PDF document text
- http://mebelhotel.ru/userfiles/files/5295844091.pdfIn PDF document text
- http://miryangpension.com/FileData/ckfinder/files/20210920_30BB563D690F8DF2.pdfIn PDF document text
- http://svaz-podnikani.cz/files/file/pavazamokatulodexe.pdfIn PDF document text
- https://wemservice.com/ckfinder/userfiles/files/movexoratefuxorer.pdfIn PDF document text
- http://sdes.in/uploads/zemezitodudumugi.pdfIn PDF document text
- https://burgas-remonti.com/userfiles/file/81720297738.pdfIn PDF document text
- http://daieimotors.com/js/upload/files/zosexuvuv.pdfIn PDF document text
- https://iphonerepairservice.nl/app/webroot/files/userfiles/files/rumevokobirajupekonapegig.pdfIn PDF document text
- https://sssmri.com/ckfinder/userfiles/files/42197719565.pdfIn PDF document text
- http://www.fonfe.com/uploads/files/83506514297.pdfIn PDF document text
- https://itchanoi.vn/uploads/news_file/zepenonogimazabazuxo.pdfIn PDF document text
- http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161413b725c9b5---jezepekegom.pdfIn PDF document text
- http://internet-trade.eu/UserFiles/file/1648907690.pdfIn PDF document text
- https://polandpools.com/contents/files/mezediguvod.pdfIn PDF document text
- https://5of7edwardstreet.com/assets/media/files/manefeginepab.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=best+1911+cleaning+kitPDF 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_off0000b4f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB4F1	10548 bytes
SHA-256: `8586ca3fea3adbef71183333b29dbb44b65922a7921f5c97d09d165182ee2458`
`font_01_sfnt_off0000cd3d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD3D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000e54f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE54F	17864 bytes
SHA-256: `4581bbc363d17a2f045ffa618caa5a17240dd0e16a2f01bb06fc8b73334b409f`

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