PDF malware analysis — malicious · eb309620eaa622ef

MALICIOUS

PDF

87.6 KB Created: 2021-06-30 19:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: ad4ba85a18b6f6d627d4e4d18abdb056 SHA-1: 92b56ea04c4151639db62dafbe01fa4de849a8b9 SHA-256: eb309620eaa622efa98cc4ea9f062015f9876495a6b0e971fd296ffc50a70bce

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristics indicate the presence of a link farm pointing to compromised WordPress upload directories and disposable hosting, suggesting an attempt to obscure the true destination or evade detection. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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 https://huntic.ru/uplcv?utm_term=racoons+on+my+roof PDF link annotation
- http://hart-metale.pl/gimnazjum/userfiles/file/vinorisuzinerekarajutere.pdfIn PDF document text
- https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/06f28fd0daefa433ef5f3ae5097fce08/zeporikek.pdfIn PDF document text
- https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/da72f26869c5e6070558f70a6c192199/47677998238.pdfIn PDF document text
- https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083a29c41a4f---junejumofe.pdfIn PDF document text
- https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/cc4f37aca6112a3a2c11d5e2ea6a22b3/8912128394.pdfIn PDF document text
- http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/bprfd04mgbk11ka66v03ujve33/44592477961.pdfIn PDF document text
- http://fructusartis.com/i/File/xuxajelexadibaxote.pdfIn PDF document text
- https://akemi.ro/hirek/file/58300818121.pdfIn PDF document text
- https://designclarf.it/file/39860584001.pdfIn PDF document text
- http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7935352fa---95178644134.pdfIn PDF document text
- http://skyrunarser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210614023818611318kaujuh.pdfIn PDF document text
- http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/2adaa54445bde1ce83293d892eb5dd97/75702451113.pdfIn PDF document text
- http://rolmech-strzelno.pl/Upload/file/3093539558.pdfIn PDF document text
- https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/ha54bg4ua6dqup5fsqtbiqa3sh/balavipara.pdfIn PDF document text
- http://all-pass.com/folder/editor/file/jolabemobigorobeguv.pdfIn PDF document text
- https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/3c3bba20a35af89c38bdadee21556498/55779990471.pdfIn PDF document text
- https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/da1ab559db508ea2d0b26298a48642d9/97133820531.pdfIn PDF document text
- http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074416672e85---1010305168.pdfIn PDF document text
- http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/2fgba305msklkh8kn9kpsmhnh6/82642737674.pdfIn PDF document text
- https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be265ae900---64278627310.pdfIn PDF document text
- http://wamer.org/userfiles/file/javekabu.pdfIn PDF document text
- http://csc0731.com/userfiles/file/20210618012334_sgxh2a.pdfIn PDF document text
- https://corumosmanlimakina.com/js/ckfinder/userfiles/files/55538839774.pdfIn PDF document text
- https://matskaren.se/anvandarbilder/203/files/16810313818.pdfIn PDF document text
- https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/769d0qagn87fm70me85uqhadsf/sasojojewomijifokakuraf.pdfIn PDF document text
- https://terminal.hr/userfiles/file/11104292623.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_off0000f434.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF434	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010c4b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C4B	10288 bytes
SHA-256: `95f39cd9bc5152b84bc61e9df37ea9d3a1e5f2b9ee23dd2cf06833303fc1d024`
`font_02_sfnt_off00012375.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12375	17516 bytes
SHA-256: `ebb2f10728f55390ffb6f4c031ee25113e0bdece30d74f6afb54567eb110cfdd`

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