PDF malware analysis — malicious · b7be6422c6533753

MALICIOUS

PDF

83.3 KB Created: 2021-09-08 00:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 091f478006268dfcfe33a434c0d8819b SHA-1: 58fca87e381a6a350cf12c0d1680e8b7ac203a8f SHA-256: b7be6422c65337531cdec06c1f7a3cf26a35b4fcb1359cbc391fe39448ea2333

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to compromised websites or phishing pages. The presence of embedded URLs and the overall structure point towards a phishing or malicious redirection attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://drafthe.ru/uplcv?utm_term=todo+sobre+el+cancer+de+piel+pdf PDF link annotation
- http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160abf570e314d---gepupaxutewekaf.pdfIn PDF document text
- https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/28c0880c644ce200df3e6953f4fdd124/kumagegugu.pdfIn PDF document text
- https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/s66jupu6f2n8du2t0nsdo64id0/nememivivoxijopitamabu.pdfIn PDF document text
- https://kuepancong.com/contents//files/livovos.pdfIn PDF document text
- https://xn--interpeas-r6a.es/upload/files/fiwegix.pdfIn PDF document text
- http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160742b7484b59---kavuxowukuvuxowo.pdfIn PDF document text
- http://brilsports.ro/userfiles/file///3759960660.pdfIn PDF document text
- http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/3158b5038a40b5978457c94634dcb155/27256858881.pdfIn PDF document text
- http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d2b0a1119---fotovekegobipive.pdfIn PDF document text
- https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/5d532cd4018f5013e7e55133436f09a7/dugikubedufekok.pdfIn PDF document text
- http://gibisch.org/files/files/27808872307.pdfIn PDF document text
- http://pantanalmsnews.com.br/ckfinder/userfiles/files/pegebisujajedupikid.pdfIn PDF document text
- http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077515267f6c---3860541539.pdfIn PDF document text
- https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/702b56ea441bba90bd34ad0ac349453c/binufoz.pdfIn PDF document text
- http://easyliveconstruction.com/ci/userfiles/files/falifatovala.pdfIn PDF document text
- http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16085918c7e762---mirafeb.pdfIn PDF document text
- https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/66db2f3af623d2f1f0965d34a2d4174e/woradinozazel.pdfIn PDF document text
- https://aneri12.cz/res/file/goligesusuvagerupulivala.pdfIn PDF document text
- https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609d345bd581c---pipilizolakexefoget.pdfIn PDF document text
- http://hillandbrownfamily.com/clients/76964/File/1275911241.pdfIn PDF document text
- http://wxmx.cn/upload/ckimg/files/202109051348454665.pdfIn PDF document text
- http://bearings-home.com/userfiles/file/ravagadezagudurawodizome.pdfIn PDF document text
- http://jfe.hk/userfiles/24686367846.pdfIn PDF document text
- https://avela.md/userfiles/file/waboposibumured.pdfIn PDF document text
- https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/zigekidopefitegopegowusi.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
- https://medlineplus.gov/spanish/skincancer.htmlIn 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_off0000dea6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEA6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f6b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6B8	18548 bytes
SHA-256: `f4deb952d0f34fa8fc794ba11bcdffb9a7b735e04bf6d9c7bdc6b8e62d3f5f75`
`font_02_sfnt_off0001260b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1260B	10620 bytes
SHA-256: `02590feda3c558b0cdf37ac4f33d6526f036126438c6bbdeae467e5dd2f66aaf`

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