PDF malware analysis — malicious · 9cb4fb93e54dc5d8

MALICIOUS

PDF

87.6 KB Created: 2021-08-21 00:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: f713c25f175a9feed75440cf111d933c SHA-1: 3332c813b8402f85afa1ec1cb4fef6533b4186da SHA-256: 9cb4fb93e54dc5d83cded67628b2bb8ea9b2052ae6ff0c17eaf9d65a9739b8b5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of multiple external URIs and link farms indicates an attempt to lead the user to malicious content, likely for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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 http://jmvlpslimited.com/ci/userfiles/files/jofuxe.pdf In PDF document text
- http://bostonmentors.com/userfiles/file/19628358969.pdfIn PDF document text
- https://chambres-hotes-aube-bleue.fr/userfiles/file/199981711.pdfIn PDF document text
- http://attlas.center/userfiles/file/94467387436.pdfIn PDF document text
- http://thepokewave.com/uploads/files/sosapesizepavezudek.pdfIn PDF document text
- https://minhgianggroup.vn/upload/files/bomoxejadujilure.pdfIn PDF document text
- http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/14249238987.pdfIn PDF document text
- https://youkuvpn.com/upload/files/76792997935.pdfIn PDF document text
- http://dnepropress.net/files/file/88918370372.pdfIn PDF document text
- https://digiconelectronics.com/media/62959495223.pdfIn PDF document text
- http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160901620093a4---dubawakud.pdfIn PDF document text
- http://meuble-tunisie.com/userfiles/file/97249835445.pdfIn PDF document text
- https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/b57dbd88ccde82af0530eef71776a547/17673235904.pdfIn PDF document text
- http://portalkucharski.pl/app/webroot/media/files/48219960216.pdfIn PDF document text
- http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608445a9a152c---rasirokutap.pdfIn PDF document text
- http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777903b324a---87113361406.pdfIn PDF document text
- https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbeb3df972---nowabesepisavibodaxojos.pdfIn PDF document text
- http://suachuabaoduongmaynenkhi.com/img_quanganh/files/zuneberubetujisarosadidu.pdfIn PDF document text
- http://thecoferfamily.com/clients/7/78/7892d776c92a08c80f86ebc6236678d2/File/41581207453.pdfIn PDF document text
- https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1bfa7f78b---34835104100.pdfIn PDF document text
- http://mkconline.com/landmark/ckfinder/userfiles/files/nolukinifutebezali.pdfIn PDF document text
- https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/c75751d51cd504ee26e3afd34d1a843f/21656836924.pdfIn PDF document text
- http://parfumerieindex.nl/images/uploads/70976405756.pdfIn PDF document text
- http://srub-servis.ru/userfiles/file/fiwewepoputixomilosa.pdfIn PDF document text
- https://client-sms.com/ckfinder/userfiles/files/7314062433.pdfIn PDF document text
- https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/a8a313bad42027cd12f6f955aed93d48/70917617486.pdfIn PDF document text
- http://daiduongmetal.com/uploads/ckfinder/files/digagadozotav.pdfIn PDF document text
- https://tepihtrava.rs//files/6746423054.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=can+you+spawn+reaper+queen+on+extinctionPDF 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_off0000ef6f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF6F	10900 bytes
SHA-256: `ea2034435dff478363f08300bb9c9a4fa8be717605363fa564880bd720d78d58`
`font_01_sfnt_off000108ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108EF	17768 bytes
SHA-256: `bcef65f95cb3a2462595acb85e15034be2622c20abcc0b2c958cce5f1576d543`
`font_02_sfnt_off00013784.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13784	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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