PDF malware analysis — malicious · df0798fc524726ca

MALICIOUS

PDF

75.3 KB Created: 2021-09-22 22:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 2facface1b4e66313f360aa1e763509f SHA-1: 2754c10c563b9256eb91cc3198051b0be1737d28 SHA-256: df0798fc524726caaedaec23629f1fb2ead16e5e3cc1db7bb92fc8cd5a12f1e3

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, 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 exploiting PDF vulnerabilities for execution.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

Heuristics 7

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://inwebjor.ru/uplcv?utm_term=lord+of+the+rings+1+watch+online PDF link annotation
- https://karaari.leaddeehub.com/userfiles/files/zitukomogaroluju.pdfIn PDF document text
- http://minisadik-margaritka.ru/admin/ckfinder/userfiles/files/77177091711.pdfIn PDF document text
- http://zeminyerkaplama.com/upload/ckfinder/files/36104488947.pdfIn PDF document text
- http://stlnsk.ru/uploads/file/53290491410.pdfIn PDF document text
- http://agilesolutions.in/uploads/zefupusakubaku.pdfIn PDF document text
- http://gildiamasterov.ru/userfiles/file/90417878594.pdfIn PDF document text
- https://sanghvicranes.com/staging/media/95543337628.pdfIn PDF document text
- http://tsutae-f.com/js/upload/files/75115999103.pdfIn PDF document text
- http://basyapiemlak.com/yukleme_klasoru/userfiles/file/finezejovowopurukirexeli.pdfIn PDF document text
- http://yishiweb.com/upfiles/files/20210920_175931.pdfIn PDF document text
- http://onelove.cz/file/57795568566.pdfIn PDF document text
- https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130816947e4f---75855756746.pdfIn PDF document text
- http://streathamtaxi.com/survey/userfiles/files/zuwafixujakagafuni.pdfIn PDF document text
- http://studiotecnicomaglio.it/userfiles/files/86265315662.pdfIn PDF document text
- http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tubijukiruxovidowo.pdfIn PDF document text
- https://holycrosshealthcare.com/userfiles/files/1621018859.pdfIn PDF document text
- https://icbacademy.com/upload/files/59949113276.pdfIn PDF document text
- https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/295b3bf2244dcd0e05ffbaf446b9d01d/jiligij.pdfIn PDF document text
- http://sissonne.hu/editor_up/73243662041.pdfIn PDF document text
- http://proallprint.com/userfiles/files/xalak.pdfIn PDF document text
- http://cesarrodarte.com/userfiles/file/sadowoxixefonogodif.pdfIn PDF document text
- https://brs.jo/userfiles/files/90565205705.pdfIn PDF document text
- https://ropaalmayoreo.com/images/userfiles/file/lexirejowonijitesofete.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_off0000c1a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC1A3	10848 bytes
SHA-256: `5c3acb9c591d260cc601fba721830d9445d050b9f0f8f3554e32a859d9ef7ca3`
`font_01_sfnt_off0000da86.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA86	17364 bytes
SHA-256: `4638c1e540868def6e835cb72b106c8fc746fb54e7f9a9b9b6cabe852c3a0458`
`font_02_sfnt_off00010782.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10782	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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