PDF malware analysis — malicious · af2845f31361c74f

MALICIOUS

PDF

69.3 KB Created: 2021-08-01 14:21:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04

MD5: f343af4f90f65626ef6e8c630b4797c7 SHA-1: e02025826923a0a2a3e3bb81c8da263ba4c3725e SHA-256: af2845f31361c74f2a22006003fe0aa4008d99b79b9e89597d3cba3d82fa3d18

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier suspicious score 0.4694

Heuristics 5

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
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=libro+de+geografia+5+grado+pdf+2020 PDF link annotation
- http://aklond.com/UploadFilesfile///2021053018253020.pdfIn PDF document text
- http://dynamic1984.com/user_file/file/800722174.pdfIn PDF document text
- https://kede.org/userfiles/file/zopiga.pdfIn PDF document text
- http://myphamasia.net/upload/files/30734474141.pdfIn PDF document text
- https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/clksfgglddpt24o0h95j19oahu/wabafikurifow.pdfIn PDF document text
- http://interiorconsignments.com/media/file/21219131411.pdfIn PDF document text
- https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/id7f64pfjmn2v1qbgdv6htpvfv/70746551410.pdfIn PDF document text
- https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/u4uaq7o63l2o4l1g8et5atanje/regenipifugumojod.pdfIn PDF document text
- https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607213c801198---poguk.pdfIn PDF document text
- http://studiotecnicobergamaschi.it/userfiles/files/tevodetidubewawepabeber.pdfIn PDF document text
- http://myhomeinparis.com/userfiles/files/sosoledufaripasavutalatoj.pdfIn PDF document text
- https://lesfeesdelhetre.fr/upload/files/6891617841.pdfIn PDF document text
- https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9d397f50e---pitisufolizalolodumuna.pdfIn PDF document text
- http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d18d18884f---gozovudapam.pdfIn PDF document text
- http://yoga-privates.com/yoga-privates/file/21171565537.pdfIn PDF document text
- http://farmaciafici.com/userfiles/files/purifibu.pdfIn PDF document text
- https://pellevah.com/upload/files/dapupujuxeleborisusinu.pdfIn PDF document text
- https://espaciocultivarte.com/ckfinder/userfiles/files/99240909967.pdfIn PDF document text
- https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/802o10r5isukebql8slrgsu9s9/jinuwazokitisibasapozetu.pdfIn PDF document text
- https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099011b55046---fololafakegupupovenudob.pdfIn PDF document text
- http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b18eb650dc1---sowegijaburoluj.pdfIn PDF document text
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608019969ae76---parezugamo.pdfIn PDF document text
- https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/af9673c4144092fa36f9b0feee15853b/sagonobezivasodudewap.pdfIn PDF document text
- https://musikkursus.dk/userfiles/file/dofubizorob.pdfIn 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_off0000bb84.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBB84	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d396.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD396	16896 bytes
SHA-256: `6c37a1011abcf3c6bef4163b6cb4be95ac6f933c8cacda36448924f8a1019e26`
`font_02_sfnt_off0000fe17.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE17	10732 bytes
SHA-256: `4140376e8fb3d065ff970e4659ac2c3fbb0a50d5157af1eef5e22c8a14063375`

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