PDF malware analysis — malicious · 10a637584161d2d6

MALICIOUS

PDF

72.3 KB Created: 2021-09-13 13:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 51d2654df6b37cab19e6a5a376ddf371 SHA-1: 13b2fec2f9525e03ecc96512ee354b92ca4454a2 SHA-256: 10a637584161d2d6b0b6e96af0738d743621b5d55c8690aa5727000dab319af8

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 phishing or malware distribution. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/6m857kpjimlkvlphvt59rtnlrq/76229877717.pdf In PDF document text
- http://tovicetour.com/FileData/ckfinder/files/20210912_256FF8042B80C654.pdfIn PDF document text
- https://nvsrolko.org/ckfinder/userfiles/files/tovemelizevigolijesedu.pdfIn PDF document text
- https://horizontire.com/userfiles/file/40504129919.pdfIn PDF document text
- http://dobrejaja.com/Upload/file/mumuwanamadudegume.pdfIn PDF document text
- http://massiimo.com/piceditor/file/gafuvasuxutuxe.pdfIn PDF document text
- http://hcstonetw.com/uploads/files/202109031405408672.pdfIn PDF document text
- https://escaletravel.com/userfiles/files/xijiv.pdfIn PDF document text
- http://prime42.ru/userfiles/files/35537881511.pdfIn PDF document text
- http://alituncer.com/userfiles/file/nefipob.pdfIn PDF document text
- https://laatjehuisweerstralen.nl/upload/file/62833476855.pdfIn PDF document text
- https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16131f78ee9163---temozagagogenopos.pdfIn PDF document text
- https://leganordavigliana.it/uploads/file/bozumomusedoxagegigonew.pdfIn PDF document text
- https://gosselindesign.com/images/from_fckeditor/fichiers/revuderutefilode.pdfIn PDF document text
- http://kingsauto-bar.com/js/upload/files/befumamesow.pdfIn PDF document text
- http://sanruou.com/app/webroot/uploads/files/nejanazorotabavepa.pdfIn PDF document text
- http://tincorner.vn/uploads/files/jipapesejitisilusu.pdfIn PDF document text
- http://candientushinko.com/images/file/fifopopijux.pdfIn PDF document text
- https://kontiko.com/ktkweb3/images/upload/files/vuribusov.pdfIn PDF document text
- https://colakcivi.com/userfiles/file/xiwivifafu.pdfIn PDF document text
- http://swhos.com/upload/files/50755101539.pdfIn PDF document text
- http://ashioke.com/images/library/File/24511848963.pdfIn PDF document text
- http://gaishachuukobuhin.com/js/upload/files/jerepa.pdfIn PDF document text
- https://ristovski.mk/public_html/upload/userfiles/file/37293429221.pdfIn PDF document text
- http://yejida.com/userfiles/file/729333299.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=download+kindle+create+app+for+androidPDF link annotation
- 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_off0000b82c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB82C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d043.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD043	10624 bytes
SHA-256: `7a6499a521d47e1f53365890213d4f53292df8c585c7727e248d90c925dc1d62`
`font_02_sfnt_off0000e8ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8AD	16912 bytes
SHA-256: `074bd963a7aafa3428d5a0bf7c4c0da0402a2b9f6de6ee9a9f1fc562b2455789`

Open this report in the interactive analyzer, or submit your own file for analysis.