PDF malware analysis — malicious · 32435e85342a34e7

MALICIOUS

PDF

86.1 KB Created: 2021-09-14 06:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: fa3d8200dfd49e252057c264a67479c5 SHA-1: f2eb9e1c1331722b430c3670b0449f36008bf053 SHA-256: 32435e85342a34e74dbd56e38b9956ec97205f402105f336743a34c255b69e13

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm strategy, suggesting the document's primary purpose is to redirect users to potentially malicious sites. The embedded JavaScript likely facilitates these redirects or other malicious actions.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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://smidgel.ru/uplcv?utm_term=how+to+transfer+photos+on+android+to+sd+card PDF link annotation
- https://eghamatsafar.ir/basefile/eghamatsafar/files/sitakuzarotufor.pdfIn PDF document text
- http://enidental.com/userfiles/file/20210911100244.pdfIn PDF document text
- http://synhbio.com/upload/files/2993526967.pdfIn PDF document text
- https://linker.tw/files/33857688697.pdfIn PDF document text
- http://autolubitel-irk.ru/userfiles/file/tipedurivigotex.pdfIn PDF document text
- http://zhizhencn.com/filespath/files/20210905165957.pdfIn PDF document text
- http://idcla.net/upload/files/84977046447.pdfIn PDF document text
- https://patoman.ro/ckfinder/userfiles/files/pibivunekuvuvajomimuxata.pdfIn PDF document text
- https://u-spot.biz/js/ckfinder/userfiles/files/72559760386.pdfIn PDF document text
- http://gesundezellen.de/neu/userfiles/file/47989405990.pdfIn PDF document text
- https://adsbudget.net/userfiles/file/muriruxonuketodogizizu.pdfIn PDF document text
- http://sieuthihatgiong.vn/webroot/img/files/fowujimexovufebufuxexo.pdfIn PDF document text
- https://pametnidom.hr/pametne_kuce/userfiles/file/66210714877.pdfIn PDF document text
- http://gndpta.eu/news_objects/files/juwagufes.pdfIn PDF document text
- http://chinalabware.net/d/files/renudagin.pdfIn PDF document text
- http://betonkeritesek.eu/Content/files/vaduruda.pdfIn PDF document text
- http://zanethompson.com/userfiles/file/kosorekeg.pdfIn PDF document text
- https://iieng.org/editor/ckfinder/userfiles/files/38922881412.pdfIn PDF document text
- http://www.anclupnapoli.it/userfiles/file/93862335143.pdfIn PDF document text
- http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e84882f817---jonisivumakadavoluxoronuk.pdfIn PDF document text
- https://saatyapi.com/upload/ckfinder/files/ruletawit.pdfIn PDF document text
- https://louvre.lv/res/wysiwyg/file/29369241274.pdfIn PDF document text
- https://ashasuchikala.com/ckfinder/userfiles/files/10719424314.pdfIn PDF document text
- http://grandrosso.com/js/upload/files/49370847963.pdfIn PDF document text
- http://potentialdesign.cn/userfiles/file/1631159224.pdfIn PDF document text
- https://weekendtripskolkata.com/userfiles/file/46404746062.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_off0000ebcd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBCD	10748 bytes
SHA-256: `4b7c6f3600c3ff4cc0e2dc6d2a0f13652e80a7232a8477cd5826c467ee5aea69`
`font_01_sfnt_off00010477.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10477	17512 bytes
SHA-256: `3fa09b53b6ed9b880ba1e10312bf7794f02bfb940abf5c85edb4c2a416610311`
`font_02_sfnt_off000131fa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x131FA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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