PDF malware analysis — malicious · 043b362d4da79375

MALICIOUS

PDF

86.0 KB Created: 2021-09-17 15:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: fa23473a4ac2877ff9e84757d1a7f6cf SHA-1: fff35289df1a31f2b9661061a0acd949da3dfbd8 SHA-256: 043b362d4da7937592b1609a2ff93074e2f5f94601602540ff6b1814ca25a8b3

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, indicating it's designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF context.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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=amazon+video+player+for+android+tablet PDF link annotation
- https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/ad9412bd4f69ff9001607b5a86cda1b3/35267331622.pdfIn PDF document text
- http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nilikapu.pdfIn PDF document text
- https://majubesar.info/contents/files/20179246792.pdfIn PDF document text
- http://assessmentinsight.com/ckfinder/userfiles/files/ludexetoraxosezit.pdfIn PDF document text
- http://thegioituigiay.net/uploads/files/gexuxojo.pdfIn PDF document text
- https://samsungklimalar.com/upload/ckfinder/files/72261450626.pdfIn PDF document text
- https://junona.manyel.website/images/uploads/medium/basuzuv.pdfIn PDF document text
- http://elvirajogsi.hu/ckfinder/userfiles/files/sujiguwiwetinikuxodel.pdfIn PDF document text
- http://eis-pieschel.de/UserFiles/File/fonilug.pdfIn PDF document text
- https://sklep-pinokio.pl/web/uploads/files/62249829631.pdfIn PDF document text
- http://coverybox.box8websites.com/ckfinder/userfiles/files/sidiletimo.pdfIn PDF document text
- http://mrs-edu.com/sribati/editor/uploadfiles/gebotinirowebiburalumiwu.pdfIn PDF document text
- http://zimmerei-possert.at/3651476216.pdfIn PDF document text
- https://gbp.dropship-online.com/userfiles/files/fakoxomewejikadiwepaful.pdfIn PDF document text
- https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/9ee2da79de5ef8be1097ecf0d4b8f7c3/waxixumidifiwaliz.pdfIn PDF document text
- http://cungcapbaoduongcuanhatban.com/upload/files/87827020680.pdfIn PDF document text
- https://empezo.xyz/js/ckfinder/userfiles/files/59261798854.pdfIn PDF document text
- http://driver-jazda.pl/upload/file/lisezuxizadozenikukowuwuw.pdfIn PDF document text
- https://www.bmo-agencement.fr/ckfinder/userfiles/files/499919041.pdfIn PDF document text
- http://happyorderfood.com/uploads/files/37105024715.pdfIn PDF document text
- https://www.bramfordgc.co.uk/ckfinder/userfiles/files/wedoluvararevonunasifi.pdfIn PDF document text
- http://midospa.com/upload/files/19946923002.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_off0000ec70.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC70	10852 bytes
SHA-256: `2682e9fcb362692934a27972b6f975074e52e42fde7662c762d9ad7bfac7063f`
`font_01_sfnt_off0001054f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1054F	17352 bytes
SHA-256: `761095af8548716df5b04bea7a03a5764a271ff8123cd1d48a62a358ed420fe1`
`font_02_sfnt_off00013249.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13249	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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