MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a fake CAPTCHA or human verification prompt. This suggests an attempt to lure users into executing further actions, likely to download a second-stage payload from one of the numerous embedded URLs. The presence of multiple external URIs and a link farm heuristic further supports this phishing and download-lure pattern.
Machine Learning
- Nyx PDF Classifier malicious score 0.9991
Heuristics 7
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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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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://chcial.ru/uplcv?utm_term=ets2+for+android+without+verification PDF link annotation
- https://aokman-drive.com/d/files/pujodelonuka.pdfIn PDF document text
- http://elementyzlaczne.pl/media/file/7159815219.pdfIn PDF document text
- https://indiachristian.org/uploads/files/mifogimezak.pdfIn PDF document text
- https://ontech.vn/images/ckeditor/files/15310723519.pdfIn PDF document text
- http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rofelenejikurovokure.pdfIn PDF document text
- https://tpijobportal.com/ckeditor/ckfinder/userfiles/files/60686830984.pdfIn PDF document text
- https://bor-diing.com/upload/files/55266192776.pdfIn PDF document text
- http://eros-arena.com/eros/userfiles/file/92604854995.pdfIn PDF document text
- http://hondasushi.com/uploads/files/11352373825.pdfIn PDF document text
- http://penzion.sarmo.cz/Images/file/mirivesovadagenejibevikab.pdfIn PDF document text
- http://abwmercury.com/uploads/files/7302335538.pdfIn PDF document text
- http://izumrud38.com/ckfinder/userfiles/files/10649049558.pdfIn PDF document text
- http://aylabawadi.ae/userfiles/file/1885555673.pdfIn PDF document text
- https://textosl.com/upload/editor/file/48830543657.pdfIn PDF document text
- https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/98acfb3cbd5084ba1627a158c51bf4d4/sonetapiven.pdfIn PDF document text
- http://aloisiquadri.it/userfiles/files/kasejilogu.pdfIn PDF document text
- https://7mark3t2-7aya.com/contents/files/muruvuxopaguvakeroge.pdfIn PDF document text
- https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/b055685cd1ddabcae5b971cde9ce8075/18692409148.pdfIn PDF document text
- http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161403a397901b---viwinizekunezedavovefive.pdfIn 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://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_off0000e170.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE170 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000f987.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF987 | 10880 bytes |
SHA-256: 446190ccb8e6795f4fbf2934649a2f58860466d8c0e04345c3f3170ed2f15ec4 |
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font_02_sfnt_off000112cb.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x112CB | 17376 bytes |
SHA-256: b3045c394c9b26621b3e1b8b6ccedf98617154b8ad3b62289317d429bbf21587 |
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