PDF malware analysis — malicious · 15af415688f96d41

MALICIOUS

PDF

84.6 KB Created: 2021-07-08 19:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: b3184d76c28541b5206887b7e53e4e19 SHA-1: 963ecee91c435b10bc0249067cb8f3ea8047152e SHA-256: 15af415688f96d41636c4ccf8ffa016dace24cc75704aa45c55cf20cfe51aad1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and link farms indicates an attempt to lead users away from the document to potentially malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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=southwest+chili+lime+ranch+salad PDF link annotation
- http://whscardinals1963.com/clients/9/9e/9e5fab02d16e7113a74bdd4e7828f974/File/64702838968.pdfIn PDF document text
- https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/b4a72cf54e39c01ac7fef0c829d3384b/4354465730.pdfIn PDF document text
- https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a49cf42a95---94582130656.pdfIn PDF document text
- http://thesprotia.gr/uploads/file/jelubuturisabododatoxemu.pdfIn PDF document text
- https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/3b8e384b114fd67c17450d19e76bfc4d/meraxiru.pdfIn PDF document text
- http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbaadd05a9---fororeladog.pdfIn PDF document text
- https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3f400e034---tovewijini.pdfIn PDF document text
- http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2dbcbf38d---degixeredazorogudokid.pdfIn PDF document text
- https://deepex.hu/hirek/files/35748219955.pdfIn PDF document text
- https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/a9958dd21d0057876461999f4992ef00/46133689644.pdfIn PDF document text
- http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/ibv1h6oo570m0em3cm1j5easg4/jawira.pdfIn PDF document text
- http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800f9f5fe1c---dikuviwigi.pdfIn PDF document text
- http://applexin.com/ttpsea/files/file/bunumapumav.pdfIn PDF document text
- https://contabil-fiscal.ro/mm/file/wowisusujuvisodesazibikux.pdfIn PDF document text
- http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/456be41e9f9f6451e90ebe22288a4b3b/gujufabalexudususonuxuko.pdfIn PDF document text
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16076436e8160d---8497624289.pdfIn PDF document text
- http://congtydaihai.com/upload/files/tulixemibanakuno.pdfIn PDF document text
- http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607074be4b994---kirusafelajeluxazof.pdfIn PDF document text
- http://bloomx.com/sites/all/sites/bloomx.com/files/33272036087.pdfIn PDF document text
- https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608232b88ac66---27972084249.pdfIn PDF document text
- https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ee45fmfb56k6j0lsr8ebqu4dm3/2253616465.pdfIn PDF document text
- https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e83e5f6f0---91926153678.pdfIn PDF document text
- http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb4817a38---20928563669.pdfIn PDF document text
- http://meandnetworking.com/ckfinder/userfiles/files/8551009382.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_off0000e694.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE694	17392 bytes
SHA-256: `b6fa4e230906b9b41060ce1f38a567b15d90326a89c6d4307d24d274343950f5`
`font_01_sfnt_off000113f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x113F4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012c0b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C0B	10896 bytes
SHA-256: `f06f3c3e68cf299affac306e6dfecbdabf15783fc1d706edd066decf429469ee`

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