MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting it functions as a link farm to distribute malicious content. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially harmful websites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9942
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 https://serviceservice.eu/userfiles/file/nitelarar.pdf
- http://nicenpos.com/userData/board/file/90484322557.pdf
- http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cef53ce7921---dovifowesudoxorowimusaw.pdf
- http://eprdel.cz/userfiles/file/pikun.pdf
- https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160896c4a384a4---65470059833.pdf
- http://liebherr-tr.com/userfiles/file/76649159359.pdf
- https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b87fd897cb---pidapefezojoz.pdf
- https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099dbbc7d97e---24125274776.pdf
- http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98ce1b3e00---86063088301.pdf
- https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/35ba139cc37f893f50319abd7a083c57/87452183971.pdf
- http://szentimresiklos.hu/upload/file/29126998921.pdf
- http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cefb62b441e---23043971388.pdf
- https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/32cade3917e759bb87efb3399029c966/64469546557.pdf
- http://coffee33.ru/archive/file/25441636635.pdf
- http://csptech.net/admin/userfiles/file/zipunuveromi.pdf
- http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160823f6c9b41e---gemodixijiziketazosu.pdf
- http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce26145015---tibabomiv.pdf
- https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcab8b5044d---81953111422.pdf
- http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b093663a581---27875119688.pdf
- http://moreit.ch/productinfo/file/63743522272.pdf
- http://akcjonariusz.com/UserFiles/file/9637834379.pdf
- http://cukierniabrzezinski.pl/www/artizam/fck/file/86817894514.pdf
- https://accuratesearch.com/userfiles/file/41660011096.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=spell+to+get+a+new+job
- 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_off00010893.bin4fa0b0bea6b7b9e4534d8841a13a7758aa4711d2660ccedc3cbdab1de8287859 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10893 | 17528 bytes |
font_01_sfnt_off00013614.bin04dc1e0d9f8d7f5694f60e7b173cb70336afbf168ab2bcfd8df16e650197f367 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13614 | 10500 bytes |
font_02_sfnt_off00014dfd.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x14DFD | 16792 bytes |
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