PDF malware analysis — malicious · 76610b7160abd2ea

MALICIOUS

PDF

86.9 KB Created: 2021-07-14 01:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 6ca92ca3e1e1cce481103b38c2338968 SHA-1: 9a5ddf7071dd06770d7cb4b563810ce825765353 SHA-256: 76610b7160abd2eaa15b72bbea65ae14f62c3b20d1de0fba80425ca75ac732df

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The file's structure and the presence of external URIs indicate it is likely used as a lure to deliver a secondary payload or facilitate phishing attacks.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://huntic.ru/uplcv?utm_term=dancer+with+bouquet PDF link annotation
- https://juhaszautovill.hu/userfiles/file/weguwu.pdfIn PDF document text
- https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7bcae368a---liderutupexopozilovuj.pdfIn PDF document text
- http://fitviewer.biz/files/file/birisem.pdfIn PDF document text
- http://ristorantebiscione.com/userfiles/files/11297723336.pdfIn PDF document text
- http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072c1656d072---51902753720.pdfIn PDF document text
- http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2070ebd38---91592834238.pdfIn PDF document text
- http://gabortech.comadmin/file/jesevupizemedijofe.pdfIn PDF document text
- http://avandcie-automation.com/ckfinder/userfiles/files/papolapajugakidi.pdfIn PDF document text
- https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d036f1c986d97c054847673892ded2ba/6083769876.pdfIn PDF document text
- https://ancoraeducacion.com/images/daxanuzanez.pdfIn PDF document text
- https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/99eec69353ab4883bc995347652e66b4/42368593894.pdfIn PDF document text
- https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/dd3a9fecf3c99dac5441dd850bbffd89/govimiromut.pdfIn PDF document text
- https://binarbaid.com/public_html/userfiles/file/83118010.pdfIn PDF document text
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/014af46228c43035eb92868a21734d82/jamesadipanelup.pdfIn PDF document text
- https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/98b1e34a362dc13744f502e5c8ba0d21/1686802123.pdfIn PDF document text
- https://samsungvrvklima.com/upload/ckfinder/files/99468302137.pdfIn PDF document text
- https://sogelec-eng.com/files/ckfinder/files/bofeguxinulunu.pdfIn PDF document text
- http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85fb29510---30478248736.pdfIn PDF document text
- https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/5971c58a1fd1ae0a3289590f963c313e/36642745125.pdfIn PDF document text
- https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/825179ab9bca8acf52d7bfa9c235aea6/3304365418.pdfIn PDF document text
- http://plnjl.com/userfiles/files/7106221752.pdfIn PDF document text
- https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/n2ehjdd7il5tkmmbcknd01qtvd/dirapuvutupe.pdfIn PDF document text
- https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/2hvdem1njpqrg049nd805i1196/dasoxisotefutaf.pdfIn PDF document text
- https://parokisantolukas.org/Uploads/userfiles/files/97405384662.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_off0000ef10.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF10	10588 bytes
SHA-256: `9f6b543494050b69ae9db8dbeea94a8a57618cfa4fdfcaae53eb029669eba3a2`
`font_01_sfnt_off00010740.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10740	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011f52.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F52	17636 bytes
SHA-256: `d985ee0213614957de28fbbfef5a752fb7a66341581cfd2dc415ea1d7e0ee222`

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