PDF malware analysis — malicious · ccb92d52cbb52145

MALICIOUS

PDF

80.8 KB Created: 2021-09-22 16:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 7e5b53946f3b6dd606ae09efff4911eb SHA-1: fd238073a65202d5a5d8518fa33c9e534e6992e6 SHA-256: ccb92d52cbb521450ccf0d4350896862a329594d1ed96e2b545390a3d931dd18

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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://pixomot.ru/uplcv?utm_term=running+windows+on+android PDF link annotation
- https://ntct-dz.com/ckfinder/userfiles/files/kinokenax.pdfIn PDF document text
- http://okfilm.kr/userData/board/file/21074970512.pdfIn PDF document text
- https://transdeliveris.lt/userfiles/file/76660292459.pdfIn PDF document text
- http://mstreatmentadvances.com/userfiles/files/61157598693.pdfIn PDF document text
- http://alnoorcity.com/userfiles/file/61507300921.pdfIn PDF document text
- http://forma8.kz/ckfinder/userfiles/files/zuzekimipomidomi.pdfIn PDF document text
- http://appartementslisa.it/an3_Uploads/file/78365582820.pdfIn PDF document text
- http://myxroad.net/upload/userfiles/file///464524749.pdfIn PDF document text
- http://dansungsala.com/uploads/files/29527994275.pdfIn PDF document text
- https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2a7996cde---43909930539.pdfIn PDF document text
- https://cargoservice.pl/cargoservice/userfiles/file/66325176662.pdfIn PDF document text
- http://jpind.pl/userfiles/file/63891496855.pdfIn PDF document text
- http://konstruktor33.ru/app/webroot/files/files/21315230359.pdfIn PDF document text
- http://zjbfjt.com/upload/files/29497564466.pdfIn PDF document text
- http://sweatrinserepeat.com/ckfinder/userfiles/files/22043163601.pdfIn PDF document text
- https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/610850963.pdfIn PDF document text
- http://alpes-maritimes.proximeo.com/ckfinder/userfiles/files/vuwazut.pdfIn PDF document text
- http://balalajka.nu/media/mabasoxoxevaxebiwelovifug.pdfIn PDF document text
- https://sadex.pl/fck/file/karurokikanuxajizogo.pdfIn PDF document text
- http://www.deep2001.com/images/library/File/zawolidebamirazoxuvofidiw.pdfIn PDF document text
- http://apicn.net/upload/files/zukatimolusovetoxa.pdfIn PDF document text
- http://veewood.com/file_media/file_image/file/kuludadaxe.pdfIn PDF document text
- http://bitree.net/ckfinder/userfiles/files/sabagun.pdfIn PDF document text
- http://www.martiusstaden.org.br/js/ckfinder/userfiles/files/91592715179.pdfIn PDF document text
- http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210916025949.pdfIn PDF document text
- http://artdental.hu/editor_up/sanuvigokula.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_off0000d83d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD83D	17800 bytes
SHA-256: `baf3d330411f62c6ebfa4bb4fff3525b612cbcb76d9bff9a7b7cda7bc404fd82`
`font_01_sfnt_off000105ec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105EC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011e03.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E03	10376 bytes
SHA-256: `48e8e2e86700c5b6edeaa17bd1c2b7248acefde4f4e1ec1b64c17d84f7e0e246`

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