PDF malware analysis — malicious · 299eb5576c34bb30

MALICIOUS

PDF

84.9 KB Created: 2021-08-20 11:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 8640cd2ae7fe2f0d41d56dd0424a77e2 SHA-1: c26bd4ca7afed1574399d2c8c8e18fb89c9a89a9 SHA-256: 299eb5576c34bb30640c9c96dd2b54322c2bd4e68c8f8815e95a056af53f22d9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://garglob.ru/uplcv?utm_term=libros+de+gregg+braden+en+espanol+gratis+pdf PDF link annotation
- http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b763117bdf3---bemamijokori.pdfIn PDF document text
- http://maslag.eu/userfiles/file/damedup.pdfIn PDF document text
- https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa17af0c16---lulilanotatosa.pdfIn PDF document text
- https://master.plus/wp-content/plugins/super-forms/uploads/php/files/62c07bdf1ddfe0b2015ed2ca8405f452/bawugove.pdfIn PDF document text
- http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091c57a8627f---gavok.pdfIn PDF document text
- http://www.serenissimaservizi.com//files/76162846430.pdfIn PDF document text
- https://argentinaproduct.com/ckfinder/userfiles/files/zixaliweg.pdfIn PDF document text
- https://acrgroup.nl/userfiles/file/dekego.pdfIn PDF document text
- http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vizagozobo.pdfIn PDF document text
- https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/fr0junkpv676jh25s2s7k1k8q1/52643671732.pdfIn PDF document text
- http://www.predia.cz/userfiles/file/47392125516.pdfIn PDF document text
- https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9e5aa2d27---35174611782.pdfIn PDF document text
- https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16075acfee45d3---lofivopifopudofitirexu.pdfIn PDF document text
- https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/v80lfdip8tmstris9bv000504m/73265203347.pdfIn PDF document text
- https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086da0567779---61076886784.pdfIn PDF document text
- https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/43afe029ae3cbb5e6cbcc73f754bc552/damabozeno.pdfIn PDF document text
- http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0de69cbf3---43223005943.pdfIn PDF document text
- http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/16188191062.pdfIn PDF document text
- https://emprenderem.cl/files/buvezekewiduxakufogefetil.pdfIn PDF document text
- https://grandplaza.bg/uploads/assets/file/81034574432.pdfIn PDF document text
- https://bajrahrs.com/userfiles/file/11636910250.pdfIn PDF document text
- https://alshaabcoop.com/userfiles/file/savejujomenegijarejibeje.pdfIn PDF document text
- https://bishopsalamatkhokhar.org/userfiles/file/mefidagibufi.pdfIn PDF document text
- http://lahma.pl/_u/userfiles/file/92488370223.pdfIn PDF document text
- https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/35939c173ccb003c36d3b3d66335118b/boforitolofutaruvi.pdfIn PDF document text
- http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/bcd640ea64fc10b230ac8c75b2d22fe8/jezasewawugosoxot.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_off0000e4f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4F7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fd09.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD09	18040 bytes
SHA-256: `f714ea1a8a5c4edc81547ef8846218b844f2ca89eaf9bc5370c39131a952cdc9`
`font_02_sfnt_off00012b2a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B2A	10768 bytes
SHA-256: `a1a5aa5a3c1ec060b4ecbd1230e80b393b8a6b66509b0332bf698ff3de83a918`

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