PDF malware analysis — malicious · 74c66a341afcc52b

MALICIOUS

PDF

85.2 KB Created: 2021-09-19 10:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 874f2aa796d1c719568a58633f92bc46 SHA-1: f79c49a7bff7638277d81f911b5d0562e878db5e SHA-256: 74c66a341afcc52bb4e5793409b26dea430ea974fc91540905c75e5916f47b75

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, with critical heuristics indicating embedded JavaScript and external URIs. The PDF structure suggests it's designed to lure users to external sites, likely for phishing or malware delivery. The presence of embedded JavaScript (T1059.007) indicates an attempt to execute malicious code within the PDF viewer, further supporting a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://studiorapizza.it/userfiles/files/76730649170.pdf In PDF document text
- http://ux02.wadhost.com/js/ckfinder/userfiles/files/42627617665.pdfIn PDF document text
- http://radio-salsa.fr/php/rs/filesupload/file/renamogekidijudital.pdfIn PDF document text
- http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd6b9b0918---menudilaken.pdfIn PDF document text
- http://cw-cut.com/uploads/file/204544069.pdfIn PDF document text
- https://halkapsikoloji.com/userfiles/file/49190851771.pdfIn PDF document text
- http://bsl-trans.ru/admin/ckfinder/userfiles/files/nubori.pdfIn PDF document text
- http://facilitymanagementassociates.com/survey/userfiles/files/66389548390.pdfIn PDF document text
- https://nvsrolko.org/ckfinder/userfiles/files/zugag.pdfIn PDF document text
- http://spbi.cz/res/file/93391221400.pdfIn PDF document text
- https://organicfertilizerproduction.com/d/files/xodadakalixobaposagorira.pdfIn PDF document text
- http://restaurant-lyons.fr/userfiles/file/26590436606.pdfIn PDF document text
- https://ver9.sonikgps.com/ckfinder/userfiles/files/57535635338.pdfIn PDF document text
- http://plymouth-logs.co.uk/ckfinder/userfiles/files/jojadefabo.pdfIn PDF document text
- http://mastrodibaglio.it/userfiles/files/41529771409.pdfIn PDF document text
- http://forspeed.cz/ckfinder/userfiles/files/92355934879.pdfIn PDF document text
- https://oykufestivali.com/ckfinder/userfiles/files/fufadiro.pdfIn PDF document text
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138172ab1055---26017965841.pdfIn PDF document text
- http://digitalpolicycouncil.com/imagenes/file/3422995128.pdfIn PDF document text
- https://pointwebhost.com/calisma2/files/uploads/rurulinadimifodu.pdfIn PDF document text
- http://hpcad.pl/Upload/file/14827670092.pdfIn PDF document text
- https://www.agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/dugilitalu.pdfIn PDF document text
- http://wohntraumgmbh.at/bedile.pdfIn PDF document text
- http://maroba-zirndorf.de/file/76021443669.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=coin+flip+app+androidPDF 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_off0000e960.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE960	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010177.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10177	10124 bytes
SHA-256: `78cfa67587c5fc013842645e23ea33807a1514fb0e34c07d0235670efd3e5626`
`font_02_sfnt_off00011812.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11812	18140 bytes
SHA-256: `55fd1cc7aa229b524d57546cbf358c7f4b2405ab14a0090cef8e3c19cee32f80`

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