PDF malware analysis — malicious · e7f89412106c2621

MALICIOUS

PDF

81.8 KB Created: 2021-09-03 05:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 69a45dd25daf7d6d6350ea85a62674ce SHA-1: c44b92c49f9d2dece0955cf0446b6b48b8d68598 SHA-256: e7f89412106c2621915e9e3a5f9ef109d861b13dd35fb15bc6ff0b7adbd8edad

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.5347

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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
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://bluza-shop.ru/content/File/palazumanalu.pdf In PDF document text
- https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/7c25f87b60398ca4d9af22f4af7beea8/92953967948.pdfIn PDF document text
- http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4bc0433b9---buguxoximadumubaturapozef.pdfIn PDF document text
- http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091da020697d---8150238978.pdfIn PDF document text
- https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/aa73671b72bc23f8c9be6ce17313776e/52920746113.pdfIn PDF document text
- https://preciseenergygroup.com/media/33761155152.pdfIn PDF document text
- https://a2designbg.com/userfiles/file/68559488048.pdfIn PDF document text
- http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c188702ab---5354440183.pdfIn PDF document text
- http://turar-mussin.com/userfiles/File/19947517573.pdfIn PDF document text
- http://anhuizhkj.com/upload_fck/file/2021-5-19/20210519002619632352.pdfIn PDF document text
- https://culturasiapamplona.com/guiarte_userfiles/files/lofeja.pdfIn PDF document text
- http://adbuilder.at/ckfinder/userfiles/files/28892497072.pdfIn PDF document text
- https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/3dd7pna3uejes56rk3uf4k9g1h/43463240497.pdfIn PDF document text
- http://seyrimerdin.com/userfiles/file/46162026393.pdfIn PDF document text
- http://tradeweb.es/userfiles/file/80373205497.pdfIn PDF document text
- https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16089bc2482c30---709484270.pdfIn PDF document text
- https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/odgbak6s26sgqoelqpmatfvj43/wejoxeduvunonekibefano.pdfIn PDF document text
- http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/d2cf47f00dcfea3db91a13b166b2064e/1544653666.pdfIn PDF document text
- https://bharatbiodiesel.com/userfiles/file/41522958635.pdfIn PDF document text
- https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/1kjt3dqbvkge2cbk4ub554i3gs/purazopelipenawasijiji.pdfIn PDF document text
- http://christopherspubandgrille.com/userfiles/files/ruxararumipanedipenikakud.pdfIn PDF document text
- https://nhuadailoan.vn/upload/userfiles/files/tedilad.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=manual+de+bienvenida+del+hotel+holiday+innPDF link annotation
- 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_off0000ec0b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC0B	10492 bytes
SHA-256: `bf2ac193a4c8c488d042bb4d5a8993ceace97af669e1167a55d0d7b580794d6b`
`font_01_sfnt_off000103c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103C7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011bd9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11BD9	17752 bytes
SHA-256: `9bd63c95d5d94903c8f9532a051cb45ce1a6f155380bde56ab7591be25271de9`

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