PDF malware analysis — malicious · 92403735d7089696

MALICIOUS

PDF

91.3 KB Created: 2021-07-25 04:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16

MD5: cacbd572018946068c8ac56ab13dac8c SHA-1: 96491fb8b73c4f63e37a2f7ac6d8a8ca00be8686 SHA-256: 92403735d7089696a64dc004118bcdbe1cce43f74e52eeb86b9108399fe4b589

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting it functions as a link farm. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a deliberate effort to create a network of links for SEO manipulation or to host malicious content. The embedded URLs are likely intended to redirect users to phishing sites or download further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9866

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://septumdent.com/img/userfiles/files/30129855028.pdf In PDF document text
- http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7857cc87c6---44332022979.pdfIn PDF document text
- https://travelstore.tn/userfiles/file/65731304741.pdfIn PDF document text
- http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb8256be26---89379275368.pdfIn PDF document text
- https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/ift2m9ef048dc2q30jv700dp2s/jukiwifotezofepevarowomo.pdfIn PDF document text
- http://polyalpan.hu/_user/file/12322932143.pdfIn PDF document text
- http://hookmyweddingup.net/clients/73542/File/59877648736.pdfIn PDF document text
- https://portugaliaimagyarok.com/ckfinder/userfiles/files/48415115248.pdfIn PDF document text
- https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/7be283cb08d12a0d97f81252c8eb69ed/nonoki.pdfIn PDF document text
- http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160aa24ae532f1---3610196740.pdfIn PDF document text
- https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607924d7b5911---tobibabare.pdfIn PDF document text
- https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608032edc524c---13262553204.pdfIn PDF document text
- http://j1medical.com/uploaded/file/tudusagibojavikosiwofi.pdfIn PDF document text
- https://mkontakt.pl/dat//file/wuteke.pdfIn PDF document text
- https://associazionedynamica.it/uploads/file/xadopexojubuwujoxovumiwo.pdfIn PDF document text
- https://cowichanseniors.ca/userfiles/file/77722851457.pdfIn PDF document text
- http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160eca6b18f096---60241316327.pdfIn PDF document text
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4dd618635---84375517534.pdfIn PDF document text
- http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16083c63d8ab18---12455696537.pdfIn PDF document text
- https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/e234110c582d7f7286efc1afc953dd4b/faromogalefibep.pdfIn PDF document text
- https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/1cba7adf7fe91192c2442999681cdae9/53336153968.pdfIn PDF document text
- https://peterdegendt.be/file/mumaxewegux.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9333998013---debaruporaso.pdfIn PDF document text
- http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fff4ba7320---17777034406.pdfIn PDF document text
- http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fb8a9272b---kezebosaguru.pdfIn PDF document text
- https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/4a518dbae41b3bb271f75ef1df61a763/12120685524.pdfIn PDF document text
- http://qhzs88.com/admin/fckeditor_upfiles/file/2021072501513780554.pdfIn PDF document text
- https://africanresearchcenter.com/userfiles/file/rimawuwupib.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=where+to+put+custom+maps+warcraft+3+reforgedPDF 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_off0000fcd8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCD8	17764 bytes
SHA-256: `0e09d44447663f4405692cecaae04913289380cfd0e4780c9041591109145124`
`font_01_sfnt_off00012b94.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B94	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000143ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x143AB	11176 bytes
SHA-256: `efe6eca9ec5b6a03e5871d86c37df3329acfc29d77862b912ddd64eefd6c3878`

Open this report in the interactive analyzer, or submit your own file for analysis.