PDF malware analysis — malicious · 5fc613fd69d3356d

MALICIOUS

PDF

132.9 KB Created: 2021-07-06 13:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: db582c433880f350834143f60237fe1e SHA-1: e7c64dd56ae38ed6b385e307156e5b45e1dce6ba SHA-256: 5fc613fd69d3356de4a3164f4f897641a91bf6f7f81026ecbcec5cb006d148b8

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 as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to numerous URLs hosted on compromised CMS platforms and disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to exploit users.

Machine Learning

Nyx PDF Classifier malicious score 0.9788

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://nomylo.ru/uplcv?utm_term=seasons+of+haves+and+have+nots PDF link annotation
- https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac7af9fd1e---95360173541.pdfIn PDF document text
- https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/vqav2mut262l9nv4po1jvvglnr/radoxigor.pdfIn PDF document text
- https://bluetact.com/locktactyuma/userfiles/file/44570676777.pdfIn PDF document text
- https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a7106f4a4e2---jisilalijuko.pdfIn PDF document text
- http://mnwebdesign.dk/userfiles/file/76600351615.pdfIn PDF document text
- http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7fda2a69f---20678202529.pdfIn PDF document text
- https://travelsafeway.com/userfiles/file/nilunupedoxam.pdfIn PDF document text
- http://prestinoequitacion.com/imagenes/upload/files/66144721899.pdfIn PDF document text
- https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/j2454pd6hvr9obct7qtuqucs56/37083393188.pdfIn PDF document text
- https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/c4ab1361b878b20bbddccc859f859ee8/bulemegiwunusezo.pdfIn PDF document text
- https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092a748c803f---36043610473.pdfIn PDF document text
- https://aronabritcan.com/userfiles/file/nelusilewokebip.pdfIn PDF document text
- http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607790d1a8148---58578128087.pdfIn PDF document text
- https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/b528a2a086d41887c880f55805827ff2/birarul.pdfIn PDF document text
- http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/b27492a8b8c950695df1416c6a4eb873/73587367068.pdfIn PDF document text
- https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/1ccdecb463d6011baf745c8f39f5e8dd/3523394832.pdfIn PDF document text
- https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/js9f47heoqro1lg98po1e1tmr4/wosetupikokutoz.pdfIn PDF document text
- http://allaboutdowney.com/userimages/wisem.pdfIn PDF document text
- http://homespakistan.net/magzine/uploadfiles/file/waxerejakokilotulamikeb.pdfIn PDF document text
- http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a20d9ce503---34230650482.pdfIn PDF document text
- http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc89197bc5f---madamojisixixavumujumon.pdfIn PDF document text
- https://mattress-leader.com/media/41585211109.pdfIn PDF document text
- https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607092dcd3ffd---50822106174.pdfIn PDF document text
- http://hoshitorionline.com/uploads/files/lusegexom.pdfIn PDF document text
- http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160d3bf3a5a5d6---giwokejilob.pdfIn PDF document text
- https://xanbiente.de/userfiles/file/zafavi.pdfIn PDF document text
- https://unosms.us/userfiles/file/38084810485.pdfIn PDF document text
- http://leadershipcareer.kr/fckeditor/_upload/file/tevunubene.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_off0001a6f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A6F7	10352 bytes
SHA-256: `b58b62c36bb08e616741db385d88fa7dc73dd52e3af805727b38cf3a5ae3fd15`
`font_01_sfnt_off0001be4e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1BE4E	17300 bytes
SHA-256: `468bc22a52f5d013e898b095eda24870b74c179e245354a0cf0717836f5af62b`
`font_02_sfnt_off0001ebbb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1EBBB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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