PDF malware analysis — malicious · 2eb78a6b90fb8b47

MALICIOUS

PDF

85.7 KB Created: 2021-09-06 16:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 35206a5c6656ebeedc19db657ea7dda6 SHA-1: 1c62419f89e797aa857684d6045fddee6a129196 SHA-256: 2eb78a6b90fb8b476659a78e24e903735be1820b68a126bd7d53252cbde233b0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, 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 upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a191aaf0b1f---84770697791.pdf In PDF document text
- http://albatrossmrn.com/konadnew/userfiles/file/77704868940.pdfIn PDF document text
- https://channeloflove.com/ckfinder/userfiles/files/bisetolofuguwibijori.pdfIn PDF document text
- http://sun-green.de/ckfinder/userfiles/files/5395971391.pdfIn PDF document text
- https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/60a4dd8234c2908aed7b8eb79829978e/30499019088.pdfIn PDF document text
- https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/cde7869e430db674a203e9ea87c1c1ce/buzejetakemokupomew.pdfIn PDF document text
- http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/betovepodesiwib.pdfIn PDF document text
- http://anupbolivia.com/images/files/51098738545.pdfIn PDF document text
- https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3ccd19a38---91710306275.pdfIn PDF document text
- http://www.multigacos.com/admin/uploaded/fck/file/jekixamimewadovuge.pdfIn PDF document text
- https://hasekei.jp/userfiles/file/gilelevavazazejosabiko.pdfIn PDF document text
- https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/gef56g0s89d5ldk1uctoom2sp3/wofejatugolisan.pdfIn PDF document text
- http://briztravel.com/upload/files/59093741271.pdfIn PDF document text
- https://www.disbel.es//ckfinder/userfiles/files/88607689209.pdfIn PDF document text
- https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b27d1a7bfea---2595080685.pdfIn PDF document text
- http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aed7e20393b---tasizabobawileso.pdfIn PDF document text
- http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c535ec8ae---21422015637.pdfIn PDF document text
- http://slp61.com/clients/e/e2/e296dcecfd7d10ffef0cc83fef253c72/File/44117550274.pdfIn PDF document text
- https://irastuff.com/admin/ckfinder/uploads/files/74638857186.pdfIn PDF document text
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca92d70e83---32947963208.pdfIn PDF document text
- https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd1aab2a42---34287351882.pdfIn PDF document text
- http://simonide.org/userfiles/file/kinidatisiduj.pdfIn PDF document text
- http://nextgt.eu/uploads/file/89989930419.pdfIn PDF document text
- http://nhs71.com/clients/d/d9/d9c6bfbc4bbdd207836d30c01fe5869c/File/65143960794.pdfIn PDF document text
- https://cpsguffanti.com/uploads/file/sozoleruvuvitebo.pdfIn PDF document text
- http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160987fdf0bdda---78239416430.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=manon+lescaut+book+pdfPDF 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_off0000e2de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2DE	20628 bytes
SHA-256: `8288de1cbe7d3c224587604199c37748d987d700f97153a3c04eb14e876ae5db`
`font_01_sfnt_off0001183e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1183E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013055.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13055	10744 bytes
SHA-256: `b273fd56829c7c1b3c31c0ec2c740a3ca63f90a5e6eeffd597c36d588da1e2b0`

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