PDF malware analysis — malicious · e338870e52b3c723

MALICIOUS

PDF

72.1 KB Created: 2021-09-01 01:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 5abeb65c3c1a4ffd35da78d189413d97 SHA-1: cd7f275c1e049b210610578965ff2aea1c32e3b4 SHA-256: e338870e52b3c723d2d066e216baf794fa73b6ce7c3a0bf870c32a80c0a7c77a

154 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 functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to external resources, likely for phishing or to download further malicious content. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.8257

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://nomylo.ru/uplcv?utm_term=dumbbell+upper+body+workout+pdf PDF link annotation
- https://0286869143.com/editor_images/files/wekob.pdfIn PDF document text
- http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b95ea0eabd5---mikat.pdfIn PDF document text
- https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/nv3jb3ctu71dg44145ggs4boou/68744956139.pdfIn PDF document text
- http://doctour.hu/uploads/ckfinder/userfiles/files/12665992429.pdfIn PDF document text
- http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc4cf968ae---18712753697.pdfIn PDF document text
- https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a47bd27d2a---74092424315.pdfIn PDF document text
- http://mgtofubbq.com/uploads/files/82226215934.pdfIn PDF document text
- https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160b07a4351277---82641336884.pdfIn PDF document text
- http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c243788b38a---22282125513.pdfIn PDF document text
- https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/7p3vfknq9oaqtm7kteount1kcv/babapozuwiwokipo.pdfIn PDF document text
- https://sharmtocairo.com/userfiles/files/54175620964.pdfIn PDF document text
- https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/pnn7sqb7j9dgfevktdbb25r5je/sodezofunowipolo.pdfIn PDF document text
- http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/vldc027rpq60j1fvkd3fmq6jj7/63553030759.pdfIn PDF document text
- http://105chers.netsociality.com/upload/files/nulosewor.pdfIn PDF document text
- http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092676c8a138---tejapufumivaja.pdfIn PDF document text
- https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/2cad825b143003ab102467127a6679a3/40655173793.pdfIn PDF document text
- http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/funediwutogubukofibofi.pdfIn PDF document text
- http://studioego.cz/userfiles/file/87804857389.pdfIn PDF document text
- https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/3f6r0hcos9r34auqddukqg9u1s/76887543618.pdfIn PDF document text
- https://ww150006.linebot.net/upfile/files/20210830192643.pdfIn PDF document text
- http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/3051111196.pdfIn PDF document text
- http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731cca78749---jupipapov.pdfIn PDF document text
- http://wingmanresearch.com/userfiles/files/farawuruwupopejozuz.pdfIn PDF document text
- https://lengthening-sldf.com/userfiles/file/pejiwififegijuza.pdfIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d9b6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD9B6	17880 bytes
SHA-256: `c4cd6456f0dc94d51bc61d4496470bd9c8a085b557c61eaff4c9bb8121d91cf9`
`font_01_sfnt_off00010814.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10814	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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