PDF malware analysis — malicious · 9a7e646d3bb69d44

MALICIOUS

PDF

68.0 KB Created: 2021-09-18 03:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 8ed68955eecb68a6e0abd4ce5beb5f10 SHA-1: be96bafe7603c3c495ca0683a29dd86b0c4de1be SHA-256: 9a7e646d3bb69d44f43e5a9e941b6d7d4178462a02c621ac6d31151f47ddaa6d

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it is designed to redirect users to potentially harmful websites. The PDF's structure and the presence of JavaScript point towards an attempt to exploit vulnerabilities or deliver further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9952

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://medvor.ru/uplcv?utm_term=2nd+line+cracked+apk PDF link annotation
- http://resheto.ru/users_images/fck/file/58953829810.pdfIn PDF document text
- https://nepalonetours.com/userfiles/files/gogapemosaxunun.pdfIn PDF document text
- http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613eca3bb5aef---wulox.pdfIn PDF document text
- http://mnwebdesign.dk/userfiles/file/44123007509.pdfIn PDF document text
- http://theffirm.com/userfiles/file/muregum.pdfIn PDF document text
- https://tatvan.in/userfiles/file/vanusiwobepebu.pdfIn PDF document text
- https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/24f9abfe9b190334a172ba28510d4f8a/kitebat.pdfIn PDF document text
- https://xtremefitksa.com/ckfinder/userfiles/files/76610677870.pdfIn PDF document text
- http://cabini.it/userfiles/files/fopigapepigasutudawivek.pdfIn PDF document text
- https://projekt-lesen.de/userfiles/file/48091768542.pdfIn PDF document text
- http://tsg-edinstvo.ru/userfiles/file/zuzuzidivotebok.pdfIn PDF document text
- http://masan315.net/board/imagefile/file/56752852151.pdfIn PDF document text
- https://instalacje-elektryczne.net/ckfinder/userfiles/files/82903613623.pdfIn PDF document text
- https://businesslife.com/content/file/23004630234.pdfIn PDF document text
- https://camphacement.vn/upload/files/92671480709.pdfIn PDF document text
- https://www.pu-sk.com/app/templates/js/ckfinder/userfiles/files/xenudekexek.pdfIn PDF document text
- http://kondicionery-lubertsy.ru/upload_picture/file/vipujejikixefosesamivum.pdfIn PDF document text
- http://theonejsc.com/userfiles/file/vadapekixa.pdfIn PDF document text
- https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/ruxapifolipugipuz.pdfIn PDF document text
- http://hongdacable.com/d/files/32241203506.pdfIn PDF document text
- https://ildiko-szepsegszalon.hu/userfiles/file/wixamamunasenapuvunogaf.pdfIn PDF document text
- https://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/43222640670.pdfIn PDF document text
- http://labmansour.com/app/webroot/js/ckfinder/userfiles/files/71076075405.pdfIn PDF document text
- https://cincia.ro/ckfinder/userfiles/files/70343875800.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_off0000af2d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAF2D	10236 bytes
SHA-256: `61ca92e32804e36750ea6d92a7457051091962158dc773a2c07c9a4cce099927`
`font_01_sfnt_off0000c62f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC62F	14484 bytes
SHA-256: `105a21697addbd8d8fd2ce4de782c34f89bc3e567f2d5b2020704a727f20c3ab`
`font_02_sfnt_off0000ea80.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA80	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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