PDF malware analysis — malicious · 115ad2993d35b4b2

MALICIOUS

PDF

72.9 KB Created: 2021-09-19 10:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 9884b3b3c766980c97389284ceb0f172 SHA-1: 59df104797e36f36b9f42628a8ef6a41cb4e8b05 SHA-256: 115ad2993d35b4b2e37c1c98ed10278b3426911e5c07818c6f8a0bc8f381be37

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document contains numerous embedded URLs, many pointing to PDF files hosted on various domains, suggesting a link farm designed to distribute malicious content. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9909

Heuristics 5

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.
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://infrive.ru/uplcv?utm_term=download+apk+mod+coin+master PDF link annotation
- http://mygotour.com/FileData/ckfinder/files/20210905_08ADBF969F5AF04D.pdfIn PDF document text
- http://heatherjansch.com/ckfinder/userfiles/files/zaxew.pdfIn PDF document text
- https://grupo-kayros.com/userfiles/file/62983627906.pdfIn PDF document text
- http://jainfarms.com/uploads/69793101054.pdfIn PDF document text
- http://faurerom.com/userfiles/file/3163902253.pdfIn PDF document text
- http://www.gdchgs.com/admin/img/files/nibuzejunedijoketakedi.pdfIn PDF document text
- http://omnoiptv.com/outscapes/admin/ckeditor/uploads/ck/files/11501097241.pdfIn PDF document text
- http://scantech3d.com/files/19185812794.pdfIn PDF document text
- https://igraonica.me/userfiles/file/kisegudoxapexubutonojok.pdfIn PDF document text
- http://kssi.ir/public/userfiles/file/40791530272.pdfIn PDF document text
- http://lsmtrontractor.com/upfiles/file/20210907014858.pdfIn PDF document text
- http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/lizofezanamenotarevumo.pdfIn PDF document text
- http://mtcongnghiepxanh.com/upload/fckimagesfile/59620165212.pdfIn PDF document text
- http://thenext.pk/userfiles/files/50953993668.pdfIn PDF document text
- https://zippy-inc.com/app/webroot/userfiles/files/bomit.pdfIn PDF document text
- https://girl0229960192.com/upload/users/files/jipaxugagumaxawetulu.pdfIn PDF document text
- https://picinterior.com/ckfinder/userfiles/files/94982973565.pdfIn PDF document text
- http://hermanosgolbano.com/admin/fckeditor/editor/filemanager/connectors/phpfile/61208797265.pdfIn PDF document text
- http://nineslash.com/user_file/file/nisanugad.pdfIn PDF document text
- https://portecitadelle.portecitadelle.ca/ckfinder/userfiles/files/kumelejonudogigom.pdfIn PDF document text
- http://creaorganization.com/depo/sayfaresim/file/fasulasodiripusiza.pdfIn PDF document text
- http://rnralpha.cz/res/file/99834328230.pdfIn PDF document text
- https://bluza-shop.ru/content/File/rowepulimipoxuwegenuvudug.pdfIn PDF document text
- https://rugsinc.in/UserFiles/files/64501802763.pdfIn PDF document text
- http://bobmeetin.com/media/galleries/files/80769102864.pdfIn PDF document text
- https://z87992961.com/upload/files/20210904145152.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_off0000bbb5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBBB5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d3c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD3C7	15940 bytes
SHA-256: `843b424c6b776e7d19a683345205c9f27bbf259eee95d97efbbbfc1cd4de2371`
`font_02_sfnt_off0000fca1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCA1	10856 bytes
SHA-256: `b9e67cd9c7cc9b05cb92b4ef5d5364c3eb5fded842125682ff096b3e11d29c03`

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