PDF malware analysis — malicious · 3a7b7526682cd122

MALICIOUS

PDF

108.1 KB Created: 2021-09-15 19:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 34bc3260a028f19e0376829db9b40073 SHA-1: 69237602e1a348e13cd9f40188772989dc1704a6 SHA-256: 3a7b7526682cd12254f7548fbba765bfb9936126851ab41800eba8198e01b550

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating malicious intent. The ML classifier and ClamAV detection strongly suggest this is a malicious PDF, likely used for phishing or distributing further malware. The presence of numerous links on disposable hosting further supports a link farm attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://pixomot.ru/uplcv?utm_term=pokemon+platinum+money+cheat PDF link annotation
- https://www.bramfordgc.co.uk/ckfinder/userfiles/files/80963015387.pdfIn PDF document text
- https://www.igescanada.com/ckfinder/userfiles/files/fevawojujigek.pdfIn PDF document text
- http://www.performhabitat.fr/bundles/astadmin/js/ckfinder/userfiles/files/pojisewivadufimirikaz.pdfIn PDF document text
- http://shacklefordlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lutunenaduvadagosixare.pdfIn PDF document text
- http://anoh.net/pds/userfiles/files/21688982681.pdfIn PDF document text
- https://patoman.ro/ckfinder/userfiles/files/puxerufaxawugenukem.pdfIn PDF document text
- https://jobtiara.com/files/files/17866710576.pdfIn PDF document text
- https://hunde-katzen.at/soubory/teduzegegupu.pdfIn PDF document text
- https://orig-shop-gsm.ro/ckfinder/userfiles/files/zuximegupexupojegonakaje.pdfIn PDF document text
- http://redskap.ru/userfiles/file/82933287151.pdfIn PDF document text
- http://smsalumni1971.com/apadmin/uploads/userfiles/files/45363919113.pdfIn PDF document text
- http://burningspearmarketplace.com/js/ckfinder/userfiles/files/lefoxubuzuwarirajiduj.pdfIn PDF document text
- http://hmed.vn/upload/files/84459514584.pdfIn PDF document text
- http://standardamulet.com/files/files/xakeraroxuridufipegat.pdfIn PDF document text
- http://www.donboscovizag.org/images/files/buzavikaredoroj.pdfIn PDF document text
- http://premiercontainerlines.com/media/ftp/file/juwuzi.pdfIn PDF document text
- http://merklink.nl/site/data/ws/files/rufivitot.pdfIn PDF document text
- https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/kugeletasejavizoruzutem.pdfIn PDF document text
- https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d109258411---86760929726.pdfIn PDF document text
- https://gagiongvitgiong.com/ckfinder/userfiles/files/rumewejudagatetamukokon.pdfIn PDF document text
- http://tion.hu/upload/file/jorofis.pdfIn PDF document text
- http://agataklimowska.pl/userfiles/file/tuxidow.pdfIn PDF document text
- http://ylpqzl.com/ckfinder/userfiles/files/murul.pdfIn PDF document text
- http://didula.com/img/file/likobojepukasu.pdfIn PDF document text
- http://thainightjob.com/ckfinder/userfiles/files/63495758007.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_off00014376.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14376	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00015b88.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15B88	18268 bytes
SHA-256: `d026db77a8eb839ce4a67a2d0fe30df5bece3b401ac155bedc7fe4480230bcc4`
`font_02_sfnt_off00018a81.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18A81	10676 bytes
SHA-256: `749c2339afbae22ef6ff3fd3631594eaaa1da6227fea9b990a06891943f6ece6`

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