MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document presents a fake CAPTCHA, a common lure to trick users into executing further malicious actions. Numerous URLs pointing to compromised WordPress sites and other domains were extracted, suggesting a phishing or malware distribution campaign.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
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://queure.ru/uplcv?utm_term=gba+roms+no+zip PDF link annotation
- http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/9281sgja081uoiqct114dq2087/47832955201.pdfIn PDF document text
- http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4ead7587c---43305896504.pdfIn PDF document text
- https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/germ259a4j6tqpquba5765h1rg/puvuposipuloluvize.pdfIn PDF document text
- https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/d9b7349a1710bd906f7e37ecaea005d7/79521626577.pdfIn PDF document text
- https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609584c25967a---73851225520.pdfIn PDF document text
- https://wemservice.com/ckfinder/userfiles/files/tizalurimopadeneze.pdfIn PDF document text
- https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086a2187a0f8---7505379387.pdfIn PDF document text
- http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/h8duth1fnavvks24vva43re681/nefajumuneno.pdfIn PDF document text
- http://monkey-do.net/userfiles/file/jepazegonesusur.pdfIn PDF document text
- https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/2728f6807d9115c385db5f6d63af511b/keburizis.pdfIn PDF document text
- http://ducthoaudio.com/upload/files/kivoripepexeviba.pdfIn PDF document text
- http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7419359810---42002895955.pdfIn PDF document text
- http://thegioidahoacuong.com/uploads/image/files/87640914924.pdfIn PDF document text
- https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/o23mgfkjoo5rmlauh9olg9e4kh/xikigesolopamumen.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0000f0b5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF0B5 | 5152 bytes |
SHA-256: 333165ddd0b45547a53fefeeab5ab320fcf98c8e320a705f04b7bd89d77bca3c |
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font_01_sfnt_off0001022b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1022B | 11424 bytes |
SHA-256: bfaeea46fa04cc8e3c4b9d7d03199407b5d6676290f49c5dd123c69fc04e12fa |
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font_02_sfnt_off00012933.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12933 | 16088 bytes |
SHA-256: b2ddecaff7e2361bf51021b35f9c014659943b600c4f466cb4656cea9e83b80e |
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