PDF malware analysis — malicious · 6ac4d25ee9a68c86

MALICIOUS

PDF

220.0 KB Created: 2021-09-23 14:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 1f88a423cd2137a5a633472cafaa694c SHA-1: cfdd1cac97f365fb3f4604b0032907803941cd3c SHA-256: 6ac4d25ee9a68c8666cd1638112954f0b2e7d7c6640e2a1b16e12a7a161b2133

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URLs, several of which point to compromised WordPress upload directories, suggesting it's part of a phishing or malware distribution campaign. The document body is heavily obfuscated and unreadable, but the presence of embedded URLs and the overall detection profile strongly suggest it is designed to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9928

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
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.
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://medvor.ru/uplcv?utm_term=a+slip+down+memory+lane+kickin+it PDF link annotation
- https://energooptima.hu/upload/File/tigukajuridawuma.pdfIn PDF document text
- http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613a10f190279---42996989156.pdfIn PDF document text
- https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e7120358d---20758823263.pdfIn PDF document text
- https://coastalholidayproperty.com/ckfinder/userfiles/files/29360789332.pdfIn PDF document text
- http://bradzo-ep.com/uploads/files/63848248526.pdfIn PDF document text
- https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161389dce99669---81087615208.pdfIn PDF document text
- http://packagingandfoodmachinary.com/userfiles/file/tononevogitunutugeni.pdfIn PDF document text
- http://papinchess.ru/userfiles/file/vedugenuwek.pdfIn PDF document text
- http://systempro.kr/userData/board/file/35703255312.pdfIn PDF document text
- http://ngoinvest.com/uploads/ckfinder/files/seforiserebegu.pdfIn PDF document text
- http://angelofthewinds.org/ckfinder/userfiles/files/96995449953.pdfIn PDF document text
- http://aromaonly1.com/yamituki-n/uploads/files/22217150500.pdfIn PDF document text
- https://vanphongphampmc.com/upload/files/sowoxom.pdfIn PDF document text
- http://hidropro.hu/upload/pozurevo.pdfIn PDF document text
- https://www.sterlingsez.com/ckfinder/userfiles/files/ganufabimitesubidiz.pdfIn PDF document text
- http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/nelatuperikijunuvugimez.pdfIn PDF document text
- http://ternovykh.ru/content/file/zoviwusi.pdfIn PDF document text
- https://mimpishio2.com/contents/files/dovagifurufotiwafamilu.pdfIn PDF document text
- http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/rt0hrltn3stmfh2q5ms28ktli7/61657249217.pdfIn PDF document text
- http://ordineveterinarivenezia.eu/userfiles/files/susamoxedapowadavepadu.pdfIn PDF document text
- http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f840663dc---lufopasadedusaduwejim.pdfIn PDF document text
- https://www.meditech.cz/ckfinder/userfiles/files/57646252822.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_off0002fe49.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2FE49	19236 bytes
SHA-256: `dbf376882a2e0bbe47723756978af37faa881d4d1bc5837750f57f54f2774493`
`font_01_sfnt_off0003300c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3300C	10948 bytes
SHA-256: `19f91401b2f77e11c0a7b1c895cb004e885a0a38987c2b294228000af0874dd6`
`font_02_sfnt_off0003497f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3497F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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