MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a link farm hosted on multiple compromised websites, directing users to download files. The presence of a 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and numerous unknown reputation URLs indicates a deliberate attempt to distribute malicious content. ClamAV also detected this file as a 'Pdf.Phishing.Trojan'.
Machine Learning
- Nyx PDF Classifier malicious score 0.9977
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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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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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://yugang360.com/upload_fck/file/2021-8-12/20210812194224946486.pdf
- http://x04ydivan.ru/userfiles/file/soxonibazasorolirod.pdf
- http://asahiru-ban.com/files/files/baworajupapazave.pdf
- http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d143168e51---watirisava.pdf
- http://esoftland.com/userfiles/file/77464741193.pdf
- http://popmetre.com/news/files/59681140514.pdf
- http://neodentpetrosino.it/userfiles/files/71334288844.pdf
- http://neoneofitou.com/ckfinder/userfiles/files/69254924818.pdf
- https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c65e5cb78d---gifikosuranulolopin.pdf
- http://tecsun-moscow.ru/docs/file/97703197888.pdf
- http://prttour.ca/FileData/ckfinder/files/20210616_B58D2AD905775575.pdf
- https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/25nasakkmdvea34kn9l9u18ak7/wozamedodijodafekijuwej.pdf
- https://eownauto.com/uploadpic/files/52936208034.pdf
- http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160812741af7b9---89421810469.pdf
- https://rumusjitu.com/contents//files/zitatibubudetigeputup.pdf
- http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/nrud4o1ken3tn6dsr739sb9ti3/56228184533.pdf
- https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/2a507cc22c678a706f7c40f705585b7d/13603334505.pdf
- https://medtek.vn/storage/file/ketonefilomasarobewusi.pdf
- http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f6dfbc1d6---mamoxu.pdf
- http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160be59739137d---4974326023.pdf
- https://rubyyadav.com/nbloom/fckuploads/file/lerariz.pdf
- https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/f7fa5edf9e4a205c4d7fd216c9a7578e/tewubavibalij.pdf
- http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610eda11d8de8---jerojatibi.pdf
- http://bsa-billiard.by/images_from_html_editor/file/rimibema.pdf
- http://cadelupo.it/userfiles/files/satadedakegobutos.pdf
- https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=6th+english+guide+download
- 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_off0000ea87.bin5f7364ab7cdf8af108180b0f064703d9145a5d662aef4fc3ffdcafdb43ddc1c2 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEA87 | 18380 bytes |
font_01_sfnt_off00011a6b.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11A6B | 16792 bytes |
font_02_sfnt_off00013282.bin43efe7b2ffa42da3cc276712b98e6a9c6401cfdc29eb22d6178a29cd7a5e4e4e |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13282 | 10684 bytes |
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