PDF malware analysis — malicious · 93dbdc706668ce71

MALICIOUS

PDF

87.3 KB Created: 2021-08-18 03:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 0f50573a2776a648baa24167f4ea6205 SHA-1: 399c305054d096ce99355cf5cb07b982d36fcaf2 SHA-256: 93dbdc706668ce715152b0f6f677f5ae4b16a329d8e11b940ba9f6adfc2c9f96

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised WordPress sites and utilizing UTM parameters, suggest a link farm designed to redirect users to malicious or phishing content. The document's structure and the nature of the URLs indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

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://cructi.ru/uplcv?utm_term=free+marathi+movie+download+website+list PDF link annotation
- http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3c6ce39eb---86643708617.pdfIn PDF document text
- https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/ceb0a24eed3352c0c902ff354bc8eb08/3619694350.pdfIn PDF document text
- https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b117776e6c---46354243745.pdfIn PDF document text
- http://skipjackpoke.com/ckfinder/userfiles/files/jeguzojowiwuliponikuzamu.pdfIn PDF document text
- https://108pizza.pl/uploads/userfiles/files/16451907266.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/22c9dd18a948bd67b5c7c3045350f45b/5527271003.pdfIn PDF document text
- http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b42f4e15f6e---nirofololazeto.pdfIn PDF document text
- https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/05c0b13a04abb29dd2e2bda1184969b5/18400969710.pdfIn PDF document text
- http://harnettcountyhba.com/userfiles/file/mebesorajitemilajofajor.pdfIn PDF document text
- http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/b93e73103f739b5942c45388cacec752/31482820474.pdfIn PDF document text
- https://itandem.net/ckfinder/userfiles/files/sofakavorenava.pdfIn PDF document text
- http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083019244ba1---11176598723.pdfIn PDF document text
- http://accessiblevehicleservices.com/userfiles/file/66127933715.pdfIn PDF document text
- http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609631ee2bf1a---25846694735.pdfIn PDF document text
- http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d7e05a6c95f---68082765540.pdfIn PDF document text
- http://lacasedescaraibes.fr/file/66714477432.pdfIn PDF document text
- http://bitree.net/ckfinder/userfiles/files/xumopugodadajezaxiz.pdfIn PDF document text
- https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/5b73014c6008c082eb4643f9479fd2b2/21072233440.pdfIn PDF document text
- https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a52f9b70bf---mefoz.pdfIn PDF document text
- https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a4784a8fe54---57196053172.pdfIn PDF document text
- http://isemya.by/modules/ariol/static/ariol/ckfinder/files/10895582765.pdfIn PDF document text
- http://techcessgroups.com/userfiles/file/69665285503.pdfIn PDF document text
- https://cordovajewelry.com/images/file/10487461894.pdfIn PDF document text
- http://cambresisemploi.fr/ckfinder/userfiles/files/pareburojilelamajuwed.pdfIn PDF document text
- http://allamericannursing.com/userfiles/file/lujazevaru.pdfIn PDF document text
- 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_off0000f234.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF234	16528 bytes
SHA-256: `8232ea0baa9272bb540345bb597fb6cd502af27a106508c0ade8020dd27a5234`
`font_01_sfnt_off00011d3f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D3F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013556.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13556	10784 bytes
SHA-256: `0dbed6ae5c4ebf2f4bde0f2c454394d0ba52df405238488039db7f604eaa7530`

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