PDF malware analysis — malicious · 9bdbbdaad6cfce93

MALICIOUS

PDF

80.7 KB Created: 2021-09-22 12:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: c17651f42879d288527caed4b2b1a056 SHA-1: 27ed7855119ffa9d7d7de2bb69ec1d3a222cb123 SHA-256: 9bdbbdaad6cfce933fa47a27774a9170cc750f2fd2f8dc04e4a7d5ef7bc351a2

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains embedded JavaScript and a large number of external URIs, many of which point to disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host many links on low-reputation domains, suggesting a phishing or malware distribution campaign. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://oniceh.ru/uplcv?utm_term=apple+unofficial+phone+price+in+bd PDF link annotation
- https://pellevah.com/upload/files/wuxoguvig.pdfIn PDF document text
- http://visit-pune.com/userfiles/file/farowavowewef.pdfIn PDF document text
- https://konferencii.ru/js/ckfinder/userfiles/files/kixedorulorejukinufix.pdfIn PDF document text
- https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/if2egnbs3nipu1cq6773ljrqr4/91278891794.pdfIn PDF document text
- http://offerparts.com/upload/files/siwuxoziwirolixuwijurudes.pdfIn PDF document text
- http://avemkz.internet-match.com/upload/files/23813013507.pdfIn PDF document text
- http://motolargo.pl/userfiles/file/wuwojobulig.pdfIn PDF document text
- http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/vunusufulakusozanebego.pdfIn PDF document text
- http://koszyczarek.pl/userfiles/file/musuzomowafovulesafid.pdfIn PDF document text
- http://alpha-th.com/userfiles/file/zotubavitira.pdfIn PDF document text
- http://fazendasaojudastadeu.net/fotosempresa/files/wogukawitoxorolarese.pdfIn PDF document text
- http://szm.hu/userfiles/file/29344488785.pdfIn PDF document text
- http://elitk.ru/_files/lopozexezigeroz.pdfIn PDF document text
- http://greenbrier101.com/userimages/rosere.pdfIn PDF document text
- http://abwrosedale.com/uploads/files/35857779314.pdfIn PDF document text
- http://nhuaduongnhapkhauaz.info/upload/files/kawodususupa.pdfIn PDF document text
- https://mttrasportisrl.it/dati/upload/file/4618772866.pdfIn PDF document text
- http://dansungsala.com/uploads/files/guwerumagoxox.pdfIn PDF document text
- https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16146b33b94585---fagep.pdfIn PDF document text
- http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/86344127851.pdfIn PDF document text
- http://www.leposeur.fr/site/upload/ckfinder/files/47620696343.pdfIn PDF document text
- http://pegastelco.com/pictures/files/ruwajefabidulazivaw.pdfIn PDF document text
- http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/68214787955.pdfIn PDF document text
- http://s250801404.onlinehome.fr/img/uploaded/file/funokimukerijuzelosub.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_off0000d651.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD651	10672 bytes
SHA-256: `5e29088a06bee4eeb720f09d3c81627b7d0cf0509f309d8090c131d374de9700`
`font_01_sfnt_off0000ee71.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE71	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010683.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10683	18240 bytes
SHA-256: `5ac90d9730d3759ca070f2d6ab20aa2263a6e64a0dc8460a4aae5f847a2a9da0`

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