MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous links to external PDFs hosted on potentially compromised or disposable domains, suggesting a link farm designed to distribute further malicious content. The document body is heavily obfuscated and unreadable, but the presence of external links and the overall heuristic findings point towards a malicious intent to redirect users to harmful resources.
Machine Learning
- Nyx PDF Classifier malicious score 0.9958
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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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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Urgency / deadline lure low SE_URGENCY_LUREDocument contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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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 http://eros-arena-reutlingen.de/eros/userfiles/file/25571023007.pdf
- http://mwflower.com/upimagesfile///pawapukurubeli.pdf
- http://sun-apartments.pl/data/pages/mazirokeduxiwo.pdf
- http://www.serge-valentin.net/ckfinder/userfiles/files/xiguzerumajekojusef.pdf
- https://balaji-technology.com/userfiles/file/88959771358.pdf
- http://rayer.cn/d/files/navekugujefuwizuwegoz.pdf
- https://pollackmihalyiskola.hu/ckfinder/userfiles/files/58573152814.pdf
- http://szyoujin.com/UploadFile/file/20210913055609665.pdf
- https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/8640e275dabe4bb829442d3f21fa6458/bowipuxawufol.pdf
- http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613be3bb69617---gawobazanul.pdf
- http://thuexe7cho.vn/upload/files/refagivovodosoxipumeliga.pdf
- http://orthodoxvaidikasanghom.org/userfiles/file/kilajulivazasazudi.pdf
- https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131145564195---lidixa.pdf
- http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161377963e2c13---sofajobix.pdf
- http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/161303e7ca2dd9---xuginarajapesomeb.pdf
- https://vinadesigndanang.vn/uploads/image/files/40191911989.pdf
- https://rimsball.com/ckfinder/userfiles/files/70666523028.pdf
- http://shengyaweb.com/uploadfile/file/2021090522225986.pdf
- http://www.de.ruben.pl/ckfinder/userfiles/files/zaruretevutuxezolaxokagot.pdf
- https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613d246895d94---47445866528.pdf
- http://serramentisiciliano.it/userfiles/files/65637870587.pdf
- http://edituj.cz/res/file/48306277892.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=swan+english+grammar+pdf
- https://lapdonline.org/file/puwizabugawodiwunapego.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_off0000cfbd.bin47704bf223f29dd4f1011fcefee9e4b0038f6a1ea941a39902a78343438f7b00 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCFBD | 10888 bytes |
font_01_sfnt_off0000e879.bina1df4f460a685dba87ef1734d448d72b618dd94ed281e25b78a07a6ea6c9afb9 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE879 | 18312 bytes |
font_02_sfnt_off00011802.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11802 | 16792 bytes |
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