PDF malware analysis — malicious · 706b8ffdd1e69b29

MALICIOUS

PDF

72.8 KB Created: 2021-09-11 19:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: bebb3bd9e812e11428e14185d66e0b66 SHA-1: 3318da270f16f44c5ff2c7a6c5ed71f825e526a3 SHA-256: 706b8ffdd1e69b29fb1179be99416c956701ad6f9f3fb6a87a06b5a686ebd7da

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting and form a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading malware disguised as applications. The embedded JavaScript is likely used to facilitate the redirection to these malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://drafthe.ru/uplcv?utm_term=app+to+download+movies+to+android PDF link annotation
- http://newtarrytowndeli.com/uploads/files/faxixawegog.pdfIn PDF document text
- http://carnow.jp/js/upload/files/61772596435.pdfIn PDF document text
- https://netron.pt/app/webroot/media/files/kunexepapiwuwitagugipuxi.pdfIn PDF document text
- http://www.lalorraineperdue.com/documents/bowumuzetodolomo.pdfIn PDF document text
- http://kino-cosmik.ru/sadm_files/wazivaxelulapumojigupiro.pdfIn PDF document text
- http://metzlerranch.com/userimages/vemusuz.pdfIn PDF document text
- http://classiccar-jp.com/js/upload/files/23477336028.pdfIn PDF document text
- https://simon-daulte.com/ckfinder/userfiles/files/27182635501.pdfIn PDF document text
- https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16135ba1975fe8---25037395959.pdfIn PDF document text
- http://stellarp.com/userfiles/file/66560546426.pdfIn PDF document text
- http://rideabikenews.com/user_img/files/xaxida.pdfIn PDF document text
- http://autoneza.cz/UserFiles/File/62504406451.pdfIn PDF document text
- http://electriccityusa.com/images/fck_uploads/file/51169102878.pdfIn PDF document text
- http://st-ark.it/userfiles/files/95161885931.pdfIn PDF document text
- https://mimpisiluman.com/contents/files/29381710581.pdfIn PDF document text
- https://mamo-tato.ro/userfiles/file/31489349180.pdfIn PDF document text
- http://lateonsettay-sachs.org/userfiles/file/jegamipun.pdfIn PDF document text
- https://fainitelecommunication.com/public/editorfiles/file/17508695717.pdfIn PDF document text
- http://dieta-plus.pl/userfiles/file/5289810572.pdfIn PDF document text
- http://pacemakerpressintl.com/uploads/assets/file/kuzuretelu.pdfIn PDF document text
- http://grandviewcommunity.com/userimages/gebogelufavizutag.pdfIn PDF document text
- http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/lguligqs09u6b8kl490d06nobh/zupuvosusuduxunaxuf.pdfIn PDF document text
- http://pass38.com/images/contentimages/files/80900547820.pdfIn PDF document text
- https://armagedonspedycja.pl/files/file/titarete.pdfIn PDF document text
- http://rehahomecare.com/upload/editor/files/tejuvuwuza.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_off0000b89a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB89A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d0ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD0AC	17276 bytes
SHA-256: `a1abd064bf2222b47d828f53f874140f31c75ab3d48fdeea1a09eb33c63a709b`
`font_02_sfnt_off0000fd71.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD71	10684 bytes
SHA-256: `ac6a8f295443017bad131217782898e53a8ce13b2b126658e94c22451ad500ea`

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