MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, but the presence of external URIs and link farm heuristics strongly indicates a phishing or malware distribution attempt.
Machine Learning
- Nyx PDF Classifier malicious score 0.9912
Heuristics 6
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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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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://kythuatviet.vn/uploads/userfiles/file/tilifawexoguwunapazid.pdf In PDF document text
- http://dulichtantai.com/files/uploaded/files/51335690506.pdfIn PDF document text
- http://konikanarrowfab.com/ckfinder/userfiles/files/35953718721.pdfIn PDF document text
- http://mfahk.com/upload/files/36576544730.pdfIn PDF document text
- http://vuatoyen.com/uploads/userfiles/file/midaromosolum.pdfIn PDF document text
- https://buka.ru/sadm_files/fatifujetudafivomexumijam.pdfIn PDF document text
- https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/7rlhe1c5iasu25334nef3620hi/37872444546.pdfIn PDF document text
- https://gilboamedia.com/userfiles/file/mexasimajulanezekinobi.pdfIn PDF document text
- https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd03803494---gowakodesisuputovuzifanoj.pdfIn PDF document text
- http://ansing.nl/userfiles/file/suzabizafelapizixesud.pdfIn PDF document text
- https://oolong-dining-co.com/webroot/editor-uploads/files/larotazewonodubikunugo.pdfIn PDF document text
- http://wonsakai.com/uploads/files/77976414833.pdfIn PDF document text
- https://vhcvietnam.vn/ckeditor/images/files/voxaxijosafisabuxedusiwuw.pdfIn PDF document text
- https://sfeerweter.nl/userfiles/files/89412777815.pdfIn PDF document text
- https://angkaganjil.com/contents/files/59524944496.pdfIn PDF document text
- http://www.agenbenangbandung.net/file/36301078298.pdfIn PDF document text
- http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/59749091223.pdfIn PDF document text
- https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/lui4473eh2cud6543oiflm8uk2/89945176027.pdfIn PDF document text
- http://1mosref.ru/ckfinder/userfiles/files/24963828533.pdfIn PDF document text
- http://hoya-system.com/uploads/files/202109151625263360.pdfIn PDF document text
- http://tw-jia.com/uploads/files/202109132209311258.pdfIn PDF document text
- http://dom-2000.ru/ckfinder/userfiles/files/xexugurexu.pdfIn PDF document text
- https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/d557e1547172ca15c4b1fc1d7818ebbe/dugezizozejero.pdfIn PDF document text
- http://sirmamedia.com/ckfinder/userfiles/files/lutubu.pdfIn PDF document text
- https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/86dcbacf2b586ecc06ef655f52b1f050/zovopebefo.pdfIn PDF document text
- https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/b3kh2bodf1pcbd0edbt7f8laq4/gixakelijajinepisaganav.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+play+games+with+gamepad+on+androidPDF link annotation
- 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_off0000e5c9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE5C9 | 11028 bytes |
SHA-256: 278a731d75ac73eab6b7861cfc4fd56467545c8f4600ca57312a8aeb8f5f41ea |
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font_01_sfnt_off0000ff13.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFF13 | 17876 bytes |
SHA-256: d2f35b4fd73109c6fe1dcb0a330c6630d3b70bec16c4df0354e94b66be8c94b2 |
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font_02_sfnt_off00012d19.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12D19 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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