MALICIOUS
166
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
T1059.007 JavaScript
The PDF file was detected as malicious by ML classifiers and ClamAV, and exhibits characteristics of a social engineering attack (ClickFix). It contains numerous links, including one pointing to 'synerhu.ru' with a query parameter suggesting a Windows update lure. The presence of embedded URLs and the overall structure suggest an attempt to trick the user into visiting a malicious site, likely to download further malware.
Machine Learning
- Nyx PDF Classifier malicious score 0.9977
Heuristics 6
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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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ClickFix social engineering attack high SE_CLICKFIXDocument instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
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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://synerhu.ru/uplcv?utm_term=update+xp+to+windows+10 PDF link annotation
- https://sieuthigo.vn/upload/ck/files/13899557424.pdfIn PDF document text
- http://danangsculpture.com/uploads/image/files/jivuduvasuveloludosuwone.pdfIn PDF document text
- http://maciejabramowicz.pl/upload/files/file/piwafapusogu.pdfIn PDF document text
- http://agama-rc.com/upload/files/bebinarazonut.pdfIn PDF document text
- http://dydlhx.com/upfiles/file///wupike.pdfIn PDF document text
- https://larrialdiak.es/files/galeria/files/gikinunutedulazotubipit.pdfIn PDF document text
- http://npk-bypassdrr2.com/file_media/file_image/file/59942981481.pdfIn PDF document text
- https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/34141161283.pdfIn PDF document text
- http://jfe.hk/userfiles/96753528295.pdfIn PDF document text
- http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614121ed7ca9d---kijiralepuvipobaj.pdfIn PDF document text
- http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31816418640.pdfIn PDF document text
- http://mywymc.com/userfiles/file/82714351543.pdfIn PDF document text
- http://rydelko.eu/userfiles/file/nojujivujapiwejuwuluwidin.pdfIn PDF document text
- http://www.dawnrotaryclub.tw/UserFiles/files/80779902462.pdfIn PDF document text
- http://xn--2-140-swe8h.xn--p1ai/files/18699264446.pdfIn PDF document text
- https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/744297692015cbed44439e9176bafe9e/30523285180.pdfIn PDF document text
- https://www.afoa.org.ar/backend/ckfinder/userfiles/files/patuk.pdfIn PDF document text
- http://nattukoottam.com/userfiles/file/30467556916.pdfIn PDF document text
- https://onlineadda.net/ckfinder/userfiles/files/79343610855.pdfIn PDF document text
- http://moristas.com/userfiles/files/mivedolijepipagigupanuji.pdfIn PDF document text
- https://zhongzing.com/uploads/files/202109110932296420.pdfIn PDF document text
- https://dsverano.com/UserFiles/File/wodezaxapadezagar.pdfIn PDF document text
- http://domesticsolutionsagency.com/userfiles/file/gevulisenepeja.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_off0000e3ba.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE3BA | 17832 bytes |
SHA-256: 8b7222dca9c6771bf33f55d5f29ec600d2ef3d987b43eef9cc1aa74f1064c193 |
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font_01_sfnt_off000111dc.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x111DC | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off000129f3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x129F3 | 10608 bytes |
SHA-256: 3ec36f9e7aec905a5bcc89df483415cdebc6d78771db6db1e75367066d8081f2 |
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