PDF malware analysis — malicious · d6342de0f8b48fd2

MALICIOUS

PDF

82.5 KB Created: 2021-09-05 06:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02

MD5: 7e86e740f1640711b025dba0cd79014c SHA-1: 9bd4764f5235acbf42d7685ef2fa147c588939fe SHA-256: d6342de0f8b48fd2528aad9ef53ceacdfa18cbeef61c653610bb061513cae6c2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The document body is heavily obfuscated and contains no readable text, but the presence of multiple external links indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/a7544d25bba469d1cb41d1b42d3a84d7/3933499625.pdf In PDF document text
- https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/25772418aecea05284c2ca5ee1217b0a/31758307575.pdfIn PDF document text
- https://tenfci.org/userfiles/file/serevoxolarigofozakare.pdfIn PDF document text
- http://divodizain.ru/ckfinder/userfiles/files/93031768805.pdfIn PDF document text
- https://alternatifhosting.com/calisma2/files/uploads/sewonasebujosarakotibusor.pdfIn PDF document text
- https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/46e83af50087a7c0f327ef9be6e1e38d/83384041397.pdfIn PDF document text
- https://churchofgodinjamaica.org/app/webroot/files/39953056941.pdfIn PDF document text
- https://www.haievent.com/wp-content/plugins/super-forms/uploads/php/files/i7k2dvnphr1m8t9f4glj2g7gca/36087647472.pdfIn PDF document text
- https://confetti-seasons.ru/upload/files/80520221166.pdfIn PDF document text
- http://axiomestates.com/userfiles/file/96600497206.pdfIn PDF document text
- http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5d23eaab4---3541439331.pdfIn PDF document text
- https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/d71re1jgpmvgrle74dit5mlpm8/7512432101.pdfIn PDF document text
- https://capital-publishing.com/ckfinder/userfiles/files/bobewugalotoxoxevobuveme.pdfIn PDF document text
- http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/b86adb64592900d8e2191c71c3e02d44/gupozirovekope.pdfIn PDF document text
- http://byecook.com/ckupload/files/52998123843.pdfIn PDF document text
- https://oceanflowerhotel.com/uploads/image/files/serirejafunikaduresatoxof.pdfIn PDF document text
- http://hayatteknoloji.com/webimage/file/32530134245.pdfIn PDF document text
- https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/24d432730fad98145eebb68eef9e29b9/zapotekafiwokatov.pdfIn PDF document text
- https://lyonsinn.com/nbloom/fckuploads/file/kijurezasokelufukama.pdfIn PDF document text
- https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/0914ca735ee75cd8be8d0471a68876fb/12441380637.pdfIn PDF document text
- https://jagominum.com/contents//files/37067065768.pdfIn PDF document text
- https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/3dddba69409f0faaddd81dc71e261071/jijizunugakivokisumotiti.pdfIn PDF document text
- http://irk-yoga.ru/upload/files/zejatefezovidus.pdfIn PDF document text
- http://dvg.asia/ckfinder/uploadfiles/files/54626001273.pdfIn PDF document text
- https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c65097851---sikisalolunisetad.pdfIn PDF document text
- https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16120dde477f92---41231268661.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=descriptive+writing+igcse+pdfPDF 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_off0000deb0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEB0	17428 bytes
SHA-256: `18a349b5e4e10ff734c825afb76ae4ecf12a8bc086f9a727b885570a1869f81d`
`font_01_sfnt_off00010b73.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B73	10620 bytes
SHA-256: `56fe1105a12752242de01afe9cda7b58521dc6998d49a0e5caecf4dec93b4d02`
`font_02_sfnt_off000123ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x123BA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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