PDF malware analysis — malicious · 5d60e63ad9f8d445

MALICIOUS

PDF

80.3 KB Created: 2021-09-06 13:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 65e027898cf24e66abaeae91ffc5b6bd SHA-1: 1e1b40ed069ad41617e81955d0af3638012ed847 SHA-256: 5d60e63ad9f8d445876dd69e02374706657d8690ffa0281a38560b7a3c41d315

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 as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs that point to various domains, suggesting it functions as a link farm designed to redirect users to potentially malicious websites. The presence of compromised CMS upload links further indicates a pattern of hosting malicious content on seemingly legitimate but compromised infrastructure.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

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://garglob.ru/uplcv?utm_term=morphology+of+vascular+plants+pdf PDF link annotation
- http://osrclass1967.com/clients/8/84/84e84eb3bb32f45446e669e24fea3ebc/File/57396959546.pdfIn PDF document text
- http://www.maderas-navarro.com/ckfinder/userfiles/files/46540155309.pdfIn PDF document text
- http://fedoro.ru/upload/file/80868259787.pdfIn PDF document text
- http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/1337988759.pdfIn PDF document text
- http://himalayakebab.com/shipinc/userfiles/files/varobawokovevubidivobori.pdfIn PDF document text
- https://too.kg/wp-content/plugins/super-forms/uploads/php/files/b4072d3b5715e6ec09cc82dc36c4ea65/wunimadejixetu.pdfIn PDF document text
- http://theartofdesign.nl/ckfinder/userfiles/files/kelanuvilejetipeginu.pdfIn PDF document text
- http://bsa.by/ckfinder/userfiles/files/boliris.pdfIn PDF document text
- http://elpijisystem.com/file/kuvebirejogin.pdfIn PDF document text
- http://targhevaticane.it/userfiles/files/334234202.pdfIn PDF document text
- http://capmar.eu/userfiles/file/44631349660.pdfIn PDF document text
- https://unosms.us/userfiles/file/69517584092.pdfIn PDF document text
- http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a350a2c73a5---37012777871.pdfIn PDF document text
- https://nexusmediation.nl/files/pagukakuku.pdfIn PDF document text
- https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/ee1f91be18a4b0c82d20f38bba7f473a/51772768524.pdfIn PDF document text
- https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/0dd6a20821351a7002ee2226e0c6ae47/60090572708.pdfIn PDF document text
- http://inezorviskids.com/clients/37546/File/nisotavigovigekuloxaseb.pdfIn PDF document text
- https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab950d2481---dokogat.pdfIn PDF document text
- http://starwindows.ie/ckfinder/userfiles/files/rabepapulujatulivan.pdfIn PDF document text
- https://bd-sokolovska.eu/userfiles/file/5552822536.pdfIn PDF document text
- https://blnk.eu/userfiles/files/1575163534.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/zunopetexazanorejokajok.pdfIn PDF document text
- http://mchs67.com/clients/6/60/601da637195afcc8544498be66ee72b0/File/demozujaxesobiwejizaj.pdfIn PDF document text
- https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161186153db83e---41000546114.pdfIn PDF document text
- https://mimpidia.com/contents//files/wisubaxuso.pdfIn PDF document text
- http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a673d3e546d---84832654788.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_off0000d6f6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD6F6	10948 bytes
SHA-256: `2a53ecc5cd0f761bb77d5651ad50ed4beb3c18f708be8aa93273be9ee2b84e78`
`font_01_sfnt_off0000f032.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF032	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010844.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10844	16924 bytes
SHA-256: `8d43afa57a6ee3b5cdb797dcc769534570a60ad78ae73e76a6a662910d1ff390`

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