PDF malware analysis — malicious · 864c551dab6ab00f

MALICIOUS

PDF

82.6 KB Created: 2021-09-23 11:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 282cd9fcab6b04b531f2c259869426ff SHA-1: eb60ea8ea06c218e1715eff8ff49437df4d0b91b SHA-256: 864c551dab6ab00f56aea7aff3682775e54fb7062546c6d6fd2c4ae08e4c9d8a

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware hosting sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a deliberate attempt to create a link farm on potentially untrusted hosting.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

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 https://queure.ru/uplcv?utm_term=the+simpsons+hit+%26+run+android PDF link annotation
- https://posh.hr/files/kulomasisuwutozagi.pdfIn PDF document text
- https://theshamrockpublecco.it/file/dajubapekitalixa.pdfIn PDF document text
- https://bwhe.in/ckfinder/userfiles/files/pogafirab.pdfIn PDF document text
- http://circolosilverblufitnessclub.eu/userfiles/files/rewexaxuge.pdfIn PDF document text
- http://tiendanatacion.com/noticias/files/27664591181.pdfIn PDF document text
- http://autosoftware.company/autoresponders_images/files/kemorebusovenadutu.pdfIn PDF document text
- http://tanabuauto.com/js/upload/files/80277118905.pdfIn PDF document text
- http://bftt.marketsearching.com/upload/files/48001672323.pdfIn PDF document text
- http://abwhopewell.com/uploads/files/nitunabufiwudesejirudul.pdfIn PDF document text
- http://pn-tech.net/userData/board/file/getipugotisiwejolu.pdfIn PDF document text
- http://vibrobreaker.com/files/files/90125873064.pdfIn PDF document text
- http://yesfabric.com/images/upload/File/pawesevilamose.pdfIn PDF document text
- https://santehsevast.ru/userfiles/files/29808037822.pdfIn PDF document text
- http://studiochiodo.eu/userfiles/files/jugabeso.pdfIn PDF document text
- https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/bf32b261ddd693602383d1a7e38f1154/gigabalopedisebajubo.pdfIn PDF document text
- http://big-blue-bus.com/pics/fotos/1/file/xiligetevikoji.pdfIn PDF document text
- http://culfordequestriancentre.org/UserFiles/file/pejorem.pdfIn PDF document text
- http://roycraft.ca/userfiles/file/kumebatenajalofaxu.pdfIn PDF document text
- http://usmleworkout.com/files/file/liwinugebem.pdfIn PDF document text
- https://kopari.hu/files/file/17976003988.pdfIn PDF document text
- https://termokingbt.com/ckfinder/userfiles/files/nununenizogewoz.pdfIn PDF document text
- http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/borirogiwokijufokovewo.pdfIn PDF document text
- http://otohondamientay.com/upload/files/vomeruzisamukizurel.pdfIn PDF document text
- http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144246e7d591---vatogizujona.pdfIn PDF document text
- http://stensoproject.com/userfiles/files/11492757417.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_off0000e002.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE002	10172 bytes
SHA-256: `4ccd74b9b0e2e8dd930794436f178edfab35b9ab6bfa5f370ea10d031d5e9a8e`
`font_01_sfnt_off0000f69a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF69A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010eac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10EAC	17848 bytes
SHA-256: `a95923dbd8191274a1308ab21d62eddda39db5f549ace22a4529f3980e441c69`

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