MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains numerous links to external websites, many of which appear to be part of a link farm designed to obscure the ultimate destination. The presence of a fake CAPTCHA heuristic strongly suggests a phishing or malware distribution attempt, likely using the embedded links to deliver a second-stage payload.
Machine Learning
- Nyx PDF Classifier malicious score 0.9981
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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Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHADocument displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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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 https://krisoc.ru/uplcv?utm_term=download+game+attack+on+titan+for+android
- http://sakulchaiplace.com/Uploads/file/282766449.pdf
- http://baikalspring.ru/ckfinder/userfiles/files/44083018967.pdf
- http://antoniolescio.net/userfiles/files/pujebalote.pdf
- http://szymonadamczyk.pl/uploads/fck/file/11547984517.pdf
- https://speedwayinfo.hu/uploads/file/93003590162.pdf
- https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134e4510f150---88222787481.pdf
- http://studiotecnicomaglio.it/userfiles/files/kijon.pdf
- https://netwindowvn.com/uploads/userfiles/file/50873552308.pdf
- http://numere-mopede.ro/mm/file/65605921652.pdf
- http://jowinbio.com/upload/files/202109111453347061.pdf
- http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sivamodizosovapikapemu.pdf
- https://globalmediaminds.com/uploads/files/narupenefe.pdf
- https://gkscam.com/userfiles/file/68227336436.pdf
- http://eugensa.lt/app/webroot/uploads/userfiles/files/vusitokodulekuledixida.pdf
- http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ada092ea59---20287742426.pdf
- https://8foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/23794153374.pdf
- http://kronospan-mofa-hungary.hu/editor_up/kukexitosegomivi.pdf
- http://unionnutritech.com/upload/files/58544601927.pdf
- https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1613a773b184be---17634293507.pdf
- http://mellorymotors.ru/admin/ckfinder/userfiles/files/kimakugezimiwasarokalidar.pdf
- http://dakov.hu/_user/file/8412417008.pdf
- http://asia-test.informacittadino.net/media/files/bixeliduziwexumezefed.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_off0000db3a.bin9b431c1ab455f2162a54a3e9de7a0706f547b3b931e82b25683b3e60052ec69a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDB3A | 10832 bytes |
font_01_sfnt_off0000f400.bin2791c99272863683d25adf35fc61d9154a559d4692de74acff211d03c4e49ad1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF400 | 17400 bytes |
font_02_sfnt_off00012136.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12136 | 16792 bytes |
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