PDF malware analysis — malicious · 824d0ac5f6374c0d

MALICIOUS

PDF

83.5 KB Created: 2021-09-07 23:37:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 1c12233fdf4dfa48ab1ced8fa416156b SHA-1: 06dfc9ba0837e265a0ef20c570447abecb7ba454 SHA-256: 824d0ac5f6374c0d5767ab40c022624c7c9c568ad7d68574e7d52553199257e3

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm for SEO manipulation or redirection. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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 http://championshipsportsrings.com/clients/23492/File/nemalikozawawofatuduk.pdf In PDF document text
- http://www.cenlafilm.com/siteuploads/editorimg/file/12508001501.pdfIn PDF document text
- http://marinapogon.pl/upload/file/gukoxufunumowexufuko.pdfIn PDF document text
- https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/25743186172.pdfIn PDF document text
- http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb115068f6---wajerobapax.pdfIn PDF document text
- http://climacom.eu/userfiles/files/36327800701.pdfIn PDF document text
- https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/c9apil55vr6qm53qnv7g5rgigr/819874773.pdfIn PDF document text
- https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/ff8b40d843a671a98fe441fcb6eb77cf/nebinajukiju.pdfIn PDF document text
- http://thietbixanh.net/uploads/files/zuxogajalinu.pdfIn PDF document text
- http://allier-genealogie.org/File:/70483205072.pdfIn PDF document text
- https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecea803f89---17325500649.pdfIn PDF document text
- http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161126125db104---68581087518.pdfIn PDF document text
- https://andana.us/files/files/14858924462.pdfIn PDF document text
- https://didacostruzioni.it/userfiles/file/92458496581.pdfIn PDF document text
- https://u-spot.biz/js/ckfinder/userfiles/files/29063749535.pdfIn PDF document text
- http://terralis.eu/catalogue_dynamique/file/ninepudepumilezibez.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=adverb+english+list+pdfPDF link annotation
- 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_off0000e3b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3B2	17652 bytes
SHA-256: `8439047508898024e62725a04500f4ac0fc9ac119783bee1df942f3748f1d856`
`font_01_sfnt_off00011164.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11164	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001297b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1297B	10680 bytes
SHA-256: `0edf5417a4e7f4490b7176dd7f5a182a9c7a1c252a81ab7927ee3add06b704d6`

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