PDF malware analysis — malicious · ff24a1de2632eb0f

MALICIOUS

PDF

80.6 KB Created: 2021-07-23 03:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 228a25dbd2dcc6519fe080ef2d3e4192 SHA-1: 959431803f762cdbd346a212174ab1d6bc3a0625 SHA-256: ff24a1de2632eb0fb2cbbf8bdbda5f86399fc20c09c53e2fc0dbb0b5baab1b1f

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains heuristics indicating it is a link farm and a browser extension installation lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were directly extracted, the document's structure and embedded URLs point towards a social engineering attack aiming to compromise the user's system or credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9987

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
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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://m2m2design.com/userfiles/13638357104.pdf In PDF document text
- https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/e6mpjh14njj1p57h7667s96n97/95590067515.pdfIn PDF document text
- http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1606f6b180419f---waxuferuma.pdfIn PDF document text
- http://mlsy.cz/images/file/files/50396880259.pdfIn PDF document text
- https://selispin.com/calisma2/files/uploads/2506318284.pdfIn PDF document text
- https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/13d6fe3459eb12a96e32e3e8af2123f7/43470954640.pdfIn PDF document text
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/e6195886580312d4ee375be596768bc4/kegupifur.pdfIn PDF document text
- https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4dc9c47b09---99636768412.pdfIn PDF document text
- http://bike-aholic.com/UserFiles/file/xotiwisivovomixabot.pdfIn PDF document text
- http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5d972b95d---fisufuzuxinifaru.pdfIn PDF document text
- http://sintellect.ru/Repository/file/63556328864.pdfIn PDF document text
- http://okmarin.ru/userfiles/file/wewogibijizeboti.pdfIn PDF document text
- http://ysenb.kr/board/file/editor/file/57227888482.pdfIn PDF document text
- http://firmykominkowe.pl/Obrazki/edytor/file/99100146378.pdfIn PDF document text
- https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/0gb8tlbskkgdr1rs02va9urr2r/24301219988.pdfIn PDF document text
- https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/v2v840ndheklb3d8ppmf9brds3/3250659760.pdfIn PDF document text
- https://www.alapan.org/fckimages/file/fazoxogitetekozurara.pdfIn PDF document text
- https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/696c3277295ecab93dcb388f04fced66/pekelawuvax.pdfIn PDF document text
- https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/a15cafaec767cee2402ee325124d3610/piluzagazura.pdfIn PDF document text
- https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad909ef16ac---rumibuvipasamavomoto.pdfIn PDF document text
- http://deurenhanger.nl/userfiles/file/dimikib.pdfIn PDF document text
- https://binarbaidrealestate.com/public_html/userfiles/file/57684850760.pdfIn PDF document text
- https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/057048d3eae5d1ab1a5ed1a8d45ca440/sorusijazim.pdfIn PDF document text
- http://randoquad72.fr/userfiles/file/7637226948.pdfIn PDF document text
- https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/4t27klf295l0dlpstj29b007kk/19105278803.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=the+mighty+ant+class+3rd+question+answerPDF 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_off0000d406.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD406	16744 bytes
SHA-256: `c752ba30add3294d27e7f2528c2ea0d44052c75228fcc7de9ad800d1d2844879`
`font_01_sfnt_off0000ffc4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFC4	11400 bytes
SHA-256: `c7d6b4ddec18c2928eb758a07e34eee661f1849283e9d5122d05f9d615e40a8f`
`font_02_sfnt_off00011a14.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A14	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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