MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample is identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or trojan delivery mechanism. It functions as a link farm, with numerous URLs pointing to potentially compromised or disposable hosting, designed to redirect users. The presence of multiple external URIs and a link farm on disposable hosting suggests an attempt to distribute malicious content or phish for information.
Machine Learning
- Nyx PDF Classifier malicious score 0.9963
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall 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.
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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 http://hengtaixin.com/HangShun/ckfinder/userfiles/files/79205305676.pdf
- https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/23650900588.pdf
- http://pibar.tw/uploads/files/202109030049339602.pdf
- http://machinesupplier.cn/data/product/file/2021929_25014_202.pdf
- http://francescasciortino.it/userfiles/files/levotifibilefosijugid.pdf
- http://aqgwegfjdlk.handyfriendship.com/upload/files/56968621254.pdf
- https://crossfitbeeshark.ro/app/webroot/files/userfiles/files/20103461336.pdf
- http://cw-cut.com/uploads/file/91397188093.pdf
- https://apoiotelecom.com/imagens/img_fckeditor/file/najisefasiwe.pdf
- http://jysfh.com/upload_fck/file/2021-10-5/20211005082509195308.pdf
- http://iktoktatas.hu/files/file/kowepisinujesojizos.pdf
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614df5628d358---nuputufabomunipudum.pdf
- http://interiorconsignments.com/media/file/85837804990.pdf
- https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/79421421221.pdf
- http://fastcredit.ge/userfiles/file/66153637542.pdf
- http://almar-bus.pl/userfiles/file/gawafevatuvon.pdf
- https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/9f9a554025a208e5fb7fedd291e771d7/xowewokolimot.pdf
- http://bluebiz.kr/userData/board/file/jexuvovajefosokujelipaja.pdf
- https://tomorrowhubs.com/upload/users/files/vulipupujaluxizide.pdf
- https://hizlipin.com/calisma2/files/uploads/88974780467.pdf
- http://www.ddu-hk.cz/ckfinder/userfiles/files/15722224574.pdf
- https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614c3585e3df1---sofesupagojuwopanodibe.pdf
- https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=melting+boiling+and+freezing+point+of+water
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000c124.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC124 | 16792 bytes |
font_01_sfnt_off0000d93b.binf2ecd4ed2e74f6552f595a97ddb38afb186253cb3fc79831f6826be382521ecc |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD93B | 10784 bytes |
font_02_sfnt_off0000f1cf.bina7f1bd748736702caeec5c3388ea781144e86fd36117c68d28667f5c46d01a56 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF1CF | 16304 bytes |
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