PDF malware analysis — malicious · ad2dddc3d87842ac

MALICIOUS

PDF

80.2 KB Created: 2021-09-17 05:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 2b5b7286d4e4abee40c114b50dad99a9 SHA-1: 5d21f609eeea9a79d70094868cc874695a43b667 SHA-256: ad2dddc3d87842acc7fe35274e4a533e0fae39222f4bb554ed5afcc88b46b56f

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or redirection scheme. The PDF structure and the presence of external URIs strongly suggest it's used as a lure to direct users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9911

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://laborke.ru/uplcv?utm_term=ometv+random+chat+alternative PDF link annotation
- https://vanvoorst.info/uploaded/file/20663189947.pdfIn PDF document text
- https://binarbaidfabrication.com/public_html/userfiles/file/22736895673.pdfIn PDF document text
- http://backkwang.com/userData/board/file/8475573038.pdfIn PDF document text
- http://gddfboiler.com/uploads/files/nekusewodadiwo.pdfIn PDF document text
- http://apsencollege.org/test/fckeditor/file/zolutinirokuse.pdfIn PDF document text
- http://indexone.ru/upload/file/noponuk.pdfIn PDF document text
- https://moolans.com/uploads/files/zofuw.pdfIn PDF document text
- http://www.sosonomo.com/ckfinder/userfiles/files/mufazatarezinuwogenaxav.pdfIn PDF document text
- http://dilimkebab.com/userfiles/file/86084267884.pdfIn PDF document text
- http://spartapr.com/images/upload/file/fetorapesolovu.pdfIn PDF document text
- http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161344dcee7662---73378725268.pdfIn PDF document text
- http://openendrep.com/userfiles/files/zigasilukubijus.pdfIn PDF document text
- http://cochemical.com/upload/files/pojejurijixiros.pdfIn PDF document text
- https://www.luxboss.com/ckfinder/userfiles/files/xividedab.pdfIn PDF document text
- http://copingconversations.com/userfiles/file/43449514756.pdfIn PDF document text
- http://gyogytornasz.hu/editor_up/98870986350.pdfIn PDF document text
- http://kingswaytyres.com/project/kingsway/uploads/file/33572576385.pdfIn PDF document text
- http://hig-hegmann.de/userfiles/file/sitojizujoragumuwu.pdfIn PDF document text
- http://turinhotelcompany.com/userfiles/files/zitegelogi.pdfIn PDF document text
- http://yds-wcv.jp/free_images/files/11674756611.pdfIn PDF document text
- http://ausafe.net/images/art/files/93218608161.pdfIn PDF document text
- https://turismo-galicia.es/ckfinder/userfiles/files/mexunasepukiluteduvubo.pdfIn PDF document text
- https://cicadit.ro/UserFiles/file/goxurume.pdfIn PDF document text
- http://senvietsystem.com/ckeditor/upload/files/xomifekademawuw.pdfIn PDF document text
- https://aimara-bg.com/userfiles/file/nagevoxanorel.pdfIn PDF document text
- http://quiltingacademy.net/fckeditor/userfiles/file/87689425440.pdfIn PDF document text
- http://ewtch.com/upload/files/latelomofurizesivebilin.pdfIn PDF document text
- http://glovimex.com/uploads/ckfinder/files/rogevibekejun.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_off0000d66b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD66B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ee82.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE82	10560 bytes
SHA-256: `cd7a2c55d4deec5180537ab8bab5dfbe7f592ebc6aa574529f0478772d3b1662`
`font_02_sfnt_off00010657.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10657	17308 bytes
SHA-256: `d46fdaf55fd76e2ed028e032db40784d7f4a5e9ca999a871c956b289a3bdd6e5`

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