PDF malware analysis — malicious · 4630e7ada4896ce9

MALICIOUS

PDF

97.4 KB Created: 2021-08-15 16:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: 9c992424a7b3c4216b7b1119c645607b SHA-1: f1bf64a7f46aa21bdfb1d08130c408dd0c201751 SHA-256: 4630e7ada4896ce9c9bb280dae6784dbd4dce69d3a57ca150980db037911dc05

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 for 'Pdf.Phishing.Trojan'. The file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9924

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://pixomot.ru/uplcv?utm_term=5+interesting+facts+about+meerkats PDF link annotation
- https://doctmcooper.com/userfiles/files/dakuwi.pdfIn PDF document text
- http://tropo-design.com/ckfinder/userfiles/files/31488650749.pdfIn PDF document text
- https://mzr-avocats.com/buddha/ckfinder/userfiles/files/zolitowifetetovexo.pdfIn PDF document text
- http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16079f9b54bbac---81059153465.pdfIn PDF document text
- http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c46e79a8f1---wesevofesamonupi.pdfIn PDF document text
- http://serting.eu/userfiles/files/72401570307.pdfIn PDF document text
- https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/72b6dc788706f78a379dea78369816f5/374240875.pdfIn PDF document text
- https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/bb53a564b7c483bc648fc53b3648ff28/86399998538.pdfIn PDF document text
- https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f4d6e0d670f---bewokusesago.pdfIn PDF document text
- https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/d6416a9569b8b50a72652fcd00b1834e/90755813994.pdfIn PDF document text
- http://acpiindia.com/userfiles/file/48085782592.pdfIn PDF document text
- https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/72d63f54fb84cfd042b4291d1b503571/79107348140.pdfIn PDF document text
- https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/rowinokevobifoboz.pdfIn PDF document text
- https://georeno.ca/userfiles/files/gopurakisanovomavedumume.pdfIn PDF document text
- http://ort168.com/upload//ckeditor/files/65803767094.pdfIn PDF document text
- https://foundryindia.org/userfiles/file/lipilu.pdfIn PDF document text
- https://sanaspinler.com/calisma2/files/uploads/91931220967.pdfIn PDF document text
- https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/f534c5558fbef1273eb9a87fc5fb97b2/wenovewip.pdfIn PDF document text
- https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/dc83cc717e3fd270d1b4342a566e3681/64135504037.pdfIn PDF document text
- https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/31nae3k6cdejdkqmt26j50t98e/56088198575.pdfIn PDF document text
- https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/q1a3cdt2ake27to4s8ih06lobc/58059050164.pdfIn PDF document text
- https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/uus822q0lm0hlcj1nlap05d3v8/rariwa.pdfIn PDF document text
- https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/hiiu4mmlnt88moa3ilu13fq0hr/96906816122.pdfIn PDF document text
- http://peusch.lu/userfiles/files/39722730305.pdfIn PDF document text
- https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/la6qgb5rjue6hf2g20dtg3a2kr/gufikizibasiwezobaw.pdfIn PDF document text
- https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b54fd57f9d---zafefeditutumuvana.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_off00011854.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11854	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001306b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1306B	11004 bytes
SHA-256: `885706a30a0467a834b0ab1f2a1eb2f5f8be519ac4c5b91f2236e2bfd1b28ded`
`font_02_sfnt_off00014a07.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14A07	17320 bytes
SHA-256: `e7b09e57794ac77f4db2bb1be628bf1ea17e40b83eec2f26f682b56cc129cfe4`

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