PDF malware analysis — malicious · 2949882aa7c2492a

MALICIOUS

PDF

84.2 KB Created: 2021-08-29 12:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 266556e5ad30956c912db19e4dd7f9ac SHA-1: feb433f52817e1f07134afee0c25a99b39da1108 SHA-256: 2949882aa7c2492a27639177a14e3fe8fbf0aa860a3c7850f1decddcc5660dd3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, potentially leading to further exploitation.

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 http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795877c0df8---92400034883.pdf In PDF document text
- http://bean2beenefamilytree.com/clients/60578/File/8144749754.pdfIn PDF document text
- http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bf0ccf7a3---zovowutepav.pdfIn PDF document text
- http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072ea3528265---nojaninobovovisuwuv.pdfIn PDF document text
- https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/161137a00970da---80983434836.pdfIn PDF document text
- https://livresdarts.com/ckfinder/userfiles/files/78232407776.pdfIn PDF document text
- http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/10799853802.pdfIn PDF document text
- https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16084f48e99311---jugoxojosodogetu.pdfIn PDF document text
- http://ihdbd.org/upload/files/26031148040.pdfIn PDF document text
- https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/d38dac2eba66ded2e760534e4727b165/66063628712.pdfIn PDF document text
- https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/dtksqm3t24666e6p3dh8l405p9/larakaf.pdfIn PDF document text
- https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16097022b495d8---xabipolatumodukulopoluxoj.pdfIn PDF document text
- http://bong-dem-long.org/upload/editor/files/71448789576.pdfIn PDF document text
- http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609f51e5c91c4---wujebogawodapekefod.pdfIn PDF document text
- http://studiorinaldibedin.eu/userfiles/files/ritasijisevomuberuminu.pdfIn PDF document text
- http://weiken-rc.com/upload/files/waraxovisuviruzakoli.pdfIn PDF document text
- https://bilalyapidekorasyon.com/userfiles/file/91045867963.pdfIn PDF document text
- http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/rogukujedatotimedeguro.pdfIn PDF document text
- https://agrimal.pl/userfiles/file/sofosavusex.pdfIn PDF document text
- https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/b259ca1a5e89e696fd33ec1b01e24c7c/dunotoposibuguned.pdfIn PDF document text
- http://carrozzeriabosini.net/userfiles/files/3128556716.pdfIn PDF document text
- http://labotinnghia.com/img/files/judokukole.pdfIn PDF document text
- https://hobbes-group.com/upload/files/21035716436.pdfIn PDF document text
- http://appletechsolutions.com/userfiles/file/vatep.pdfIn PDF document text
- http://magdrywall.com/project-new/christianbook/upload_images/file/zamevawi.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0215ec557132a9929be3be74ca0c8c14/26648015331.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+make+slime+without+glue+or+borax+or+cornstarch+or+shaving+cream+or+contact+solutionPDF 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_off0000e01d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE01D	17992 bytes
SHA-256: `f595c2ce74e1f4b6bc5fad4b9cd500b983259754500e15b72e7f1ffc7d54aece`
`font_01_sfnt_off00010e77.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E77	11256 bytes
SHA-256: `7995a8f1f27329f94325d83ad69c50eed949ea1af3faa75e72edc5f3ec4ff3bb`
`font_02_sfnt_off000128bc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x128BC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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