PDF malware analysis — malicious · 5ed9798d6b55c156

MALICIOUS

PDF

85.7 KB Created: 2021-09-24 10:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 72064f74cc671241c2c253cf5811ceb6 SHA-1: 2700c90fee3520229e803ee5ff9f3619db6c1457 SHA-256: 5ed9798d6b55c156528f842f1711c679f0b0b9ef46aa890443baa111361beb5a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://crysiq.ru/uplcv?utm_term=one+piece+episodes+watch+online PDF link annotation
- http://japhina.com/upload/file/49166223057.pdfIn PDF document text
- https://cualuoihoanmy.com/uploads/userfiles/file/dawesejusarovunigedesa.pdfIn PDF document text
- http://pttaccounting.com/userfiles/files/17410430485.pdfIn PDF document text
- https://xo-sound.ru/userfiles/file/4785141364.pdfIn PDF document text
- https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613924c796599---konujixaki.pdfIn PDF document text
- http://short-story.ru/upload/file/83431641437.pdfIn PDF document text
- http://langfordfinancialservices.com/userfiles/files/84521502902.pdfIn PDF document text
- http://szerecsengyogyszertar.hu/editor_up/romem.pdfIn PDF document text
- http://ip-golubev.ru/ckfinder/userfiles/files/76779593800.pdfIn PDF document text
- http://lejuriste.ru/files/file/37116782183.pdfIn PDF document text
- http://nut-shell.net/upload/files/dewedadenadexasex.pdfIn PDF document text
- https://ashasuchikala.com/ckfinder/userfiles/files/46148710129.pdfIn PDF document text
- http://serviphony.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/62519348984.pdfIn PDF document text
- https://youkuvpn.com/upload/files/poxukosutubi.pdfIn PDF document text
- http://podolsk-kondicionery.ru/upload_picture/file/95462911370.pdfIn PDF document text
- http://partnerplus30.ru/images/fornews/files/waxedemibewot.pdfIn PDF document text
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138768bc9486.pdfIn PDF document text
- https://transport-vehicules.fr/userfiles/file/85681887794.pdfIn PDF document text
- https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/1a902777d09cd9fac3df8ba4b3cdd515/tizuwerabewobudo.pdfIn PDF document text
- https://careerexpo.alljobsinliberia.com/ckfinder/userfiles/files/8054949707.pdfIn PDF document text
- http://sugarfree-gelato.com/upload/file/vipok.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/f80a0cd85408d3e97ca17872ac6f9310/40632611214.pdfIn PDF document text
- http://landonintergroup.com/ckfinder/userfiles/files/42287718672.pdfIn PDF document text
- https://www.hermanosvalerorecio.com/ckfinder/userfiles/files/53173348718.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_off0000eb06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB06	10624 bytes
SHA-256: `fe3007d4b8d3db6dd62782abd84b9333dd435b1e7b01f41ffda782af6aadc965`
`font_01_sfnt_off0001035a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1035A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011b6c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B6C	17588 bytes
SHA-256: `8d94e58317b10bf8e883af151da702b57c2f18d2fe745b486e70c1159197561b`

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