PDF malware analysis — malicious · 189fbf98f4b0abbd

MALICIOUS

PDF

80.6 KB Created: 2021-09-23 10:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: f84270cc8e9cce8218b266cdfe4424d6 SHA-1: 843179353bde53cd1aaba915cf4eb404703fb8ea SHA-256: 189fbf98f4b0abbdad69e473fd9d3ee05dfe61f25c2a5877dd9b0d4eeea12e41

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of JavaScript points to T1059.007, and the nature of the file suggests it was delivered as a Spearphishing Attachment (T1566.001).

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://crysiq.ru/uplcv?utm_term=phineas+and+ferb+dirty+jokes PDF link annotation
- http://royalgroup.at/tmp/wikogo.pdfIn PDF document text
- http://magiepourenfants.com/images/mediamanager/file/fetitimapepe.pdfIn PDF document text
- http://impex-italia.it/userfiles/files/posumusevexodofi.pdfIn PDF document text
- https://doctornhospital.com/banglanews24/editorsfiles/files/fijugu.pdfIn PDF document text
- http://bjsddesign.com/filespath/files/20210905005933.pdfIn PDF document text
- http://imhkayseri.com/resimler/files/kikilagobanonomorejamojag.pdfIn PDF document text
- http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16148fc97c386b---fanuf.pdfIn PDF document text
- http://myredm.ru/uploads/file/33404343938.pdfIn PDF document text
- http://hajnysport.cz/FCK_userfiles/file/tejebilitabajikubi.pdfIn PDF document text
- http://alarcon-v.com/editor_upload_image/file/48965061283.pdfIn PDF document text
- http://1472bond.com/upload/Fckeditor/file/24936103201.pdfIn PDF document text
- http://joeun-it.com/userData/board/file/60050014586.pdfIn PDF document text
- https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/e61584cec284bf861895d505e6bd9257/6194819290.pdfIn PDF document text
- https://calprin.com/ckfinder/userfiles/files/tokufifedobezubibubuk.pdfIn PDF document text
- http://isystemlab.com/admin/ckfinder/userfiles/files/73853041059.pdfIn PDF document text
- http://faptvmedia.com/userfiles/file/xeviwezobomisuw.pdfIn PDF document text
- http://vouchertiket.com/airplane/ckeditor/uploads/files/1193439526.pdfIn PDF document text
- http://abwgulfport.com/uploads/files/56597278954.pdfIn PDF document text
- http://dga.gr/ILC/img/file/28575280715.pdfIn PDF document text
- http://sjar-tech.com/uploadfile/file///2021090702073755.pdfIn PDF document text
- http://partnercable.com/files/felofupojixomonipowum.pdfIn PDF document text
- http://grandrosso.com/js/upload/files/nozawuletob.pdfIn PDF document text
- http://www.tokyomagic.jp/images/library/File/36970503846.pdfIn PDF document text
- https://meganimal.pt/site/upload/file/budorosusaxi.pdfIn PDF document text
- http://fosterfreezesantarosa.com/uploads/files/bifopukuxezixetupimig.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_off0000d40c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD40C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ec1e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC1E	18296 bytes
SHA-256: `33c9d985d9c70aaccba6bf559fb66f10488048acdf9351169b015f6843c69e5e`
`font_02_sfnt_off00011bd9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11BD9	10884 bytes
SHA-256: `86e1a4aec862f9ec31e16ddc62fcff2deb7c00a969e984688e4f4c991799a074`

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