PDF malware analysis — malicious · 7cfc69d8c80e2a03

MALICIOUS

PDF

90.8 KB Created: 2021-09-24 05:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: d0bd0259e24ad781d911efebc254035d SHA-1: 68db8b9f21e589cc653d5ae6a86894bb31029bc4 SHA-256: 7cfc69d8c80e2a03621b49413b3ec1e8a3ccf9eda0ae9d8f42b23b5b07a17f9f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9800

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://oniceh.ru/uplcv?utm_term=android+device+manager+lock+and+reset+password PDF link annotation
- https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/53d18577ec8e4489d21249ece26a9ddd/80332251033.pdfIn PDF document text
- https://cheesykeju.com/contents/files/mogamew.pdfIn PDF document text
- http://hacsbathtarntaran.org/~/userfiles/file/2191198722.pdfIn PDF document text
- https://bwawarszawa.pl/upload/file/40161496722.pdfIn PDF document text
- http://lscapital.it/images/file/xubisujafesetusalaxavuj.pdfIn PDF document text
- http://kolesnikov.pro/ckfinder/userfiles/files/93296134399.pdfIn PDF document text
- http://website-design-company.in/dev3/damodar/ckfinder/core/connector/php/userfiles/files/kivunanaga.pdfIn PDF document text
- http://atsrealtyvietnam.com/upload/files/83511283828.pdfIn PDF document text
- https://sindhuinvestment.com/ckfinder/userfiles/files/rokosavubabigudafidemu.pdfIn PDF document text
- http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/talitubesujetobimo.pdfIn PDF document text
- https://rt-totaalafbouw.nl/userfiles/file/vivijotivafimuni.pdfIn PDF document text
- http://progettocecinacuore.it/writable/public/userfiles/file/koxitageno.pdfIn PDF document text
- https://shriramsteels.in/public/ckfinder/userfiles/files/nokikifinepuxidixu.pdfIn PDF document text
- https://too.kg/wp-content/plugins/super-forms/uploads/php/files/4333f459434f806f349d7d1143333968/lekedupiniwinenetufalijub.pdfIn PDF document text
- http://comitatoamiantovelodromo.org/userfiles/file/38685077466.pdfIn PDF document text
- http://thewellmanteam.com/userfiles/files/3168505325.pdfIn PDF document text
- http://huucodatlanh.com/userfiles/file/96381926787.pdfIn PDF document text
- http://etpatatietpatata.com/userfiles/files/4272199803.pdfIn PDF document text
- https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6d43bc2c6---sejavudunonisifi.pdfIn PDF document text
- https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/792769bd6dbe124d11fa3efa823e1e69/vavab.pdfIn PDF document text
- http://cadelupo.it/userfiles/files/65847421967.pdfIn PDF document text
- http://bestpokeya.com/uploads/files/fububusub.pdfIn PDF document text
- http://dr-onesrl.com/userfiles/files/50916096154.pdfIn PDF document text
- http://linyuepharm.com/upload/files/3483861427.pdfIn PDF document text
- http://style4.allwebeasy.com/userfiles/files/87999235229.pdfIn PDF document text
- http://eprdel.cz/userfiles/file/bixuzi.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_off0000fc18.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC18	18260 bytes
SHA-256: `bd1686dda53e7a8be6eb854456bc3f99e53804af98b5aa9ac61ad11182eb9b1d`
`font_01_sfnt_off00012b6d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B6D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00014384.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14384	11084 bytes
SHA-256: `3fbf46bc01a6722bd71edce318030d04f6352f8028fd9770360a0a2fee13254c`

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