PDF malware analysis — malicious · 576a377dca768303

MALICIOUS

PDF

87.1 KB Created: 2021-08-20 12:24:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: aedc147ba008b8fdff6f308dcaa09241 SHA-1: c3d1dbb34d72b91fd54a8eb56763d2f898dc4c05 SHA-256: 576a377dca76830323d1aef5297cb714b40cbdabaa3bb0b954ffbba080758467

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute phishing or malware. The embedded URLs, such as 'https://queure.ru/uplcv?utm_term=mario+kart+double+dash+iso+europe+download+dolphin', are likely used to redirect users to malicious content. No scripts were extracted, but the heuristic firings strongly indicate a phishing or malware distribution vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9982

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://queure.ru/uplcv?utm_term=mario+kart+double+dash+iso+europe+download+dolphin PDF link annotation
- https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/g72l98nshhnbc0fdvo75ajgupn/59099107290.pdfIn PDF document text
- http://pokebarslo.com/uploads/files/15623573816.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a8ff53d40---83870735810.pdfIn PDF document text
- https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b182194da---nosefizoba.pdfIn PDF document text
- http://shengyaweb.com/uploadfile/file/2021073102463353.pdfIn PDF document text
- https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/0d93c9667bbd99f4d9aebce4eac4e024/56407380026.pdfIn PDF document text
- http://kingbikeonline.com/images/upload/File/42435168780.pdfIn PDF document text
- https://secolink.sk/userfiles/file/kejesiduzu.pdfIn PDF document text
- http://md-servicios.com/userfiles/file/7467988237.pdfIn PDF document text
- https://healthmatters.me/userfiles/file/13452803231.pdfIn PDF document text
- https://museos.comarcadelasierradealbarracin.es/ckfinder/userfiles/files/96522657405.pdfIn PDF document text
- https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/u1pk7lhivtc3qfefqqjt9lmavr/27308541198.pdfIn PDF document text
- https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/143c6230e5c1e3bdf380c1e829e657b7/ritivejotikekinegek.pdfIn PDF document text
- https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/obhrqa84pudk85b34fsmdeai55/42402837892.pdfIn PDF document text
- https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/e9a26bddb7c29a05415f6199e7e4427e/lisifo.pdfIn PDF document text
- http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d583d5300---musefufijefefopuratizop.pdfIn PDF document text
- http://goodwill.as/userfiles/file/ralunafodopowu.pdfIn PDF document text
- http://comp-art.ru/userfiles/file/10575995854.pdfIn PDF document text
- https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/a30d6fbfa1206c5928f68160e2e64402/24292345616.pdfIn PDF document text
- https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d76407999---xijev.pdfIn PDF document text
- https://media-get.ru/userfiles/files/17167841426.pdfIn PDF document text
- http://myjobcareer.net/userfiles/file/2021052010294873499.pdfIn PDF document text
- http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/4f40d958c1220c7c23194ebedb735316/mebenosexalewas.pdfIn PDF document text
- http://xn--22c6buakeib3ax0bzcc5b8tlc.com/userfiles/file/77829526146.pdfIn PDF document text
- http://barrybusiness-crm.com/ressource/devis-photo/files/20866734188.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_off0000e874.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE874	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010086.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10086	19744 bytes
SHA-256: `bbe129d504ba9e8bf3db837766816edf6ade8194fc38fe5b843b287e52d21fa6`
`font_02_sfnt_off000132cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x132CF	10900 bytes
SHA-256: `c5a5a47df7166b7bc6865e68ea818305f29f50c82d5af0c89402dd2f84ca3fe8`

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