MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains a large number of links, many of which point to websites hosted on compromised CMS platforms or disposable hosting. This behavior is indicative of a link farm designed to distribute traffic to potentially malicious sites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.
Machine Learning
- Nyx PDF Classifier malicious score 0.9916
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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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 http://bigxra.com/uploadfile/file/2021051508254573499.pdf
- http://zhengfutz.com/v15/Upload/file/20216271143196176.pdf
- https://duext.com/wp-content/plugins/super-forms/uploads/php/files/113240c06966581d8db85c6fd65cc34a/83015185923.pdf
- http://tecsun-moscow.ru/docs/file/vojenerabuniwulipifiguj.pdf
- http://volamtuyetthe.com/userfiles/file/wupokitegalavadakurazuf.pdf
- https://slezanie.eu/userfiles/file/bamitoruxa.pdf
- http://saltokisport.com/uploads/files/53046008565.pdf
- https://travelinnsuites.com/nbloom/fckuploads/file/zoxasifuxubuti.pdf
- https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/uvb50h79s11hlk1r0p3v369ug3/81191211584.pdf
- http://taxicityplus.ru/userfiles/file/zarizatemuxoguzepafu.pdf
- http://daechienglishpark.com/ckfinder/userfiles/files/29409801412.pdf
- http://www.aqsclimited.com/EditorImages/file/47006485304.pdf
- https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/afced6493782d73c3dfbf4c5a540a9d9/vuniximagexexoruxigudak.pdf
- http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609210765e126---vexuve.pdf
- http://gramercygrand.ru/files/file/melod.pdf
- http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd7551eaab---mudizudavune.pdf
- https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/1a558660154ede0b8ab3e29809417c38/6078633241.pdf
- https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/3rt5jg4tte9h6eltu9dlm9hrq0/66387353900.pdf
- https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/fc2d8d6c21a1217e055647f7b0fa46b4/28083187921.pdf
- https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/i6cc8a769t3k244rntrarlv8kp/21510784247.pdf
- https://clumba-indoor.ru/files/files/totavusiwefimuzejalokidin.pdf
- https://cvsc.co/userfiles/file/luvosowodanokan.pdf
- http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807dcb97532---bivijoxixo.pdf
- https://lawina-radom.pl/files/file/ferulagexev.pdf
- http://czechdidgeridoo.com/admin/upload/file/nudevorivakamadi.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=sugarcane+processing+by+products
- 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 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off000150b0.bin5e1aaecd87d3f9604d1f124644bd1cee598d7e75f9ab0d54c18b86791a432db4 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x150B0 | 11072 bytes |
font_01_sfnt_off00016a2e.bin4f93b6168e6517ab15f5f4be920b4f53fb86254ffebf1383055ceeb588fa9bd2 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x16A2E | 16308 bytes |
font_02_sfnt_off00018073.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x18073 | 16792 bytes |
font_03_sfnt_off00019885.bin56206c4666349e1781e2ec513f53017fd9da29e5453ecc66be9de2c16bf8c290 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x19885 | 19688 bytes |
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