MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' suggests links to compromised WordPress upload storage. These findings, along with the ML classifier and ClamAV detection, strongly suggest a phishing or malware distribution attempt.
Machine Learning
- Nyx PDF Classifier malicious score 0.9916
Heuristics 7
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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 https://laborke.ru/uplcv?utm_term=mtg+arena+ios
- http://www.satunatc.ac.th/ckfinder/userfiles/files/momodivufasuxovit.pdf
- http://reguitti-engineering.it/userfiles/files/xadijinelobufe.pdf
- http://twinmd.ru/userfiles/file/wuwebomafewagufugojuzovog.pdf
- http://webinaris.blog/ckfinder/userfiles/publics/files/vurodugitividelawozu.pdf
- https://didaktika.drmix.cz/uploads/files/39636402248.pdf
- https://aslplastic.com/ckfinder/userfiles/files/3790947368.pdf
- http://xhiehchin.com/Xhieh_News/_file/jebagunot.pdf
- https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135054781f67---vasevexijuropajamezes.pdf
- http://maivietnamesecotati.com/uploads/files/xexakebefazuli.pdf
- https://bnbtravels.com/ckfinder/userfiles/files/wikenotaxalosasiwodu.pdf
- http://plusk-car.com/js/upload/files/96435863321.pdf
- https://hanurichurch.org/ckfinder/userfiles/files/88544642917.pdf
- http://dfanchem.com/upload/files/24701724818.pdf
- https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/424889f687d970d9d3c6443d554276f9/62280362000.pdf
- http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16130ad5b2691e---95498990922.pdf
- http://oprandi.it/userfiles/files/68292004639.pdf
- https://www.iieng.org/editor/ckfinder/userfiles/files/tefadunogawo.pdf
- http://kxxbs.com/uploadfiles/file/a/65438265280.pdf
- http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16145ff5f9c509---76983721207.pdf
- https://radmangroup-ye.com/rgfiles/file/vemofabamulenegopukotexa.pdf
- http://lavalnerina.it/userfiles/file/29563898018.pdf
- http://songhandiban.com/uploadfile/file/2021091101253473499.pdf
- http://yarpb.ru/pic/userfile/deselinifolotexorategedu.pdf
- http://salon-urody-bellis.pl/images/file/rusox.pdf
- http://reversetheclocknow.com/ckfinder/userfiles/files/42053235936.pdf
- https://marcuspietrek.de/MARCUS/files/file/35236702551.pdf
- 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_off0000b6dc.bin1280bb23a97cfda4a09bb66241c06261fa3785e2bedc6ba6e2c1ff97d6a9df9f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB6DC | 10232 bytes |
font_01_sfnt_off0000cdf8.bincd09a3bb74da02e49eff5d44c5394c670913d77080ac3f346f79ed90a2dc94d3 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCDF8 | 16836 bytes |
font_02_sfnt_off0000f8d6.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF8D6 | 16792 bytes |
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