PDF malware analysis — malicious · 9c3d4e97fd9db339

MALICIOUS

PDF

91.7 KB Created: 2021-07-23 04:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: 34497ca380e9022cc7e73a855b449261 SHA-1: 6766f88c92570530418b0e03d3cfac9a0f1ec5a4 SHA-256: 9c3d4e97fd9db339012caeb608ee7886363007ba56e81bde13cc2fb6fd6a290b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of numerous PDF links and the use of 'utm_term' parameters suggest an attempt to manipulate search engine rankings or distribute phishing content.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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 http://haozuowenwang.com/imagefiles/file/10133671121.pdf In PDF document text
- http://mariopresto.pl/userfiles/file/83741381057.pdfIn PDF document text
- https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/676ce5496c9526814d932190bcb6979b/wikezuwajapep.pdfIn PDF document text
- https://maryamghiasi.com/images/upload/files/65102463995.pdfIn PDF document text
- http://studiorumeo.it/userfiles/files/vivepolusufugizofaburi.pdfIn PDF document text
- http://exosportsante.fr/ckfinder/userfiles/files/74494213575.pdfIn PDF document text
- http://goldenteriyaki.com/uploads/files/nivivajifodebiv.pdfIn PDF document text
- https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b022600773e---tipolubu.pdfIn PDF document text
- https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/1be043c5a99ea98a01c78c0aa27c95c6/jimuxakubut.pdfIn PDF document text
- https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/cd11f126916183f1b28a559829682256/wotusetixut.pdfIn PDF document text
- http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4827a7c77---tadipiramodirogare.pdfIn PDF document text
- http://finproekt-msk.ru/userfiles/file/85605410093.pdfIn PDF document text
- https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c08ed121bf6---digarukulolamatoru.pdfIn PDF document text
- https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609457f490a0e---83148135187.pdfIn PDF document text
- https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0c4c0d829---vugigama.pdfIn PDF document text
- https://bocion.com/ckfinder/userfiles/files/dolobibuni.pdfIn PDF document text
- http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/jurakimabegebokamo.pdfIn PDF document text
- http://moon-villa123.com/CKEdit/upload/files/95990005618.pdfIn PDF document text
- http://clairerolo.com/userfiles/file/xuzufaritafewaxamomageken.pdfIn PDF document text
- https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/e0df89a2f8ead029437df7ae02deec75/6379142732.pdfIn PDF document text
- https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/oniebmnr3a9hjtglnr8n210ke1/3239418514.pdfIn PDF document text
- https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cc9154407---8166098962.pdfIn PDF document text
- https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d3493f65b---41775668998.pdfIn PDF document text
- http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160714682b3cbf---vujixemepozetikusipen.pdfIn PDF document text
- https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774b0c0598e---femaragizadafaz.pdfIn PDF document text
- https://angkoronetour.com/userfiles/file/tawexuxabevotiwovisabenuw.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=third+party+affidavit+of+bona+fide+marriage+templatePDF 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_off00010100.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10100	17084 bytes
SHA-256: `a3c2f4a635a0ed040860ab8ba392394bfaa7a6f51a8f63ab8c24a18f7e12fd9a`
`font_01_sfnt_off00012dce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12DCE	11060 bytes
SHA-256: `dafe383e536921ef003dbc1cb4daee2931ec9355a3ed1f2afb9ed15fe931e88d`
`font_02_sfnt_off000146f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x146F2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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