PDF malware analysis — malicious · 429cff7213f72292

MALICIOUS

PDF

86.4 KB Created: 2021-07-01 15:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: db84ecf425bdd6facf49c1832071cf97 SHA-1: b240ffc86e8e3030e416daa9c937ab5ab4491e14 SHA-256: 429cff7213f722927114ddc12625a5ca6ffaf4b28aa7ef6d16fd8966e18564fc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, embedding numerous URLs that point to compromised websites and potentially disposable hosting. These links are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9935

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://nomylo.ru/uplcv?utm_term=3+storey+townhouse PDF link annotation
- https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/1bbd9a6f50c950b71091a70c785cd987/82813340172.pdfIn PDF document text
- https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/2nn2rrq7olcq801nrfk6k50gnp/morokexoduw.pdfIn PDF document text
- https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849420ce41b---rinupewiwo.pdfIn PDF document text
- https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/a27d5b9e1432a03bb6886b2fe358f6cd/43020435716.pdfIn PDF document text
- https://datatech-int.com/userfiles/file/57974461617.pdfIn PDF document text
- https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/krh5pcbnvffh8bfqdgha2tptb8/41256816431.pdfIn PDF document text
- http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b47fa349013---87090012219.pdfIn PDF document text
- http://tuzvedo.hu/elemek/file/kubukonirafaworunolox.pdfIn PDF document text
- http://flambotour.it/themes/userfiles//files/29786972841.pdfIn PDF document text
- https://rsun.pro/admin/ckfinder/userfiles/files/belagifexowadeteg.pdfIn PDF document text
- http://csc0535.com/userfiles/file/20210622175810_b4imej.pdfIn PDF document text
- http://capital96.com/userfiles/file/bisomo.pdfIn PDF document text
- https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/o4um9d4cld25n8hn4hlj766jd4/23656064714.pdfIn PDF document text
- https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/5731c80d4bed9b636ae755ed9a627296/34913945357.pdfIn PDF document text
- https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/os5ivkep8hmqkjvbj7l28unp9v/37008994668.pdfIn PDF document text
- http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160762e62842de---pekuxojezo.pdfIn PDF document text
- http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160984a3caa182---22349739047.pdfIn PDF document text
- http://magendans.com/imagefiles/file/xupagoguzokod.pdfIn PDF document text
- http://praconsulgroup.ru/pict/file/79035393580.pdfIn PDF document text
- http://ahchala.com/img/file/mozovutirok.pdfIn PDF document text
- http://banhangcongnghe.com/upload/FCK/file/zanoxejukafubozawijebazep.pdfIn PDF document text
- https://photojet.bg/userfiles/file/tijifipemibugoralemojul.pdfIn PDF document text
- https://poolpoint.be/uploads/file/92963684808.pdfIn PDF document text
- http://sillajen.com/fckeditor/_upload/file/38157606443.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_off0000ed66.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED66	18176 bytes
SHA-256: `377d6c604ba3564212bda9224e48ef0540212a12687a23fac5e6214e4c28173c`
`font_01_sfnt_off00011cf9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CF9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013510.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13510	10280 bytes
SHA-256: `f73df38c57624714e86420e552d4d8b4eb9a0b89486c3b7632a393f3f4a74cdd`

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