MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple PDF files hosted on compromised CMS upload directories, suggesting a phishing or malware distribution campaign. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a deliberate effort to obscure the final malicious destination.
Machine Learning
- Nyx PDF Classifier malicious score 0.9973
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://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16088a98f0d622---58031275389.pdf In PDF document text
- https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/304ve501t5fdnr8seho0ae2gbo/57338941401.pdfIn PDF document text
- http://kunbot.com/upload/files/kivemejizomubidokufapowan.pdfIn PDF document text
- https://micast.de/wp-content/plugins/super-forms/uploads/php/files/62hi8slphh8bto3jo5nhglofor/ludutawujiluzovinev.pdfIn PDF document text
- https://jxloanchien.com/style/postimage/file/85734001995.pdfIn PDF document text
- http://an-ocn.ru/ckfinder/userfiles/files/vokivoruguwavafama.pdfIn PDF document text
- http://decom.pro/admin/ckfinder/userfiles/files/rilarobetodani.pdfIn PDF document text
- https://xosobacninh.vn/webroot/img/files/97568089479.pdfIn PDF document text
- http://kientrucnhacuagio.com/upload/files/zibirojiral.pdfIn PDF document text
- http://associatedreclaimed.com/userfiles/files/rukoxamijivajivijeluboke.pdfIn PDF document text
- http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/0g2q1skog9s2kolm3rclvltm62/9554305962.pdfIn PDF document text
- http://jagodkaprzedszkole.pl/userfiles/file/vusapabelitejaku.pdfIn PDF document text
- http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610bb7a1136d8---rojebonewu.pdfIn PDF document text
- http://ngor2-3.com/file_media/file_image/file/17049563084.pdfIn PDF document text
- http://nationshield.ae/userfiles/files/77318357638.pdfIn PDF document text
- http://anhuishangbiao.com/upload_fck/file/2021-5-20/20210520130930531131.pdfIn PDF document text
- https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/hb7st0k2vjlmqr2nrb1hu0egj7/puvudumuwemupa.pdfIn PDF document text
- http://universalthailand.com/images/uploads/ckfinder/files/tipeg.pdfIn PDF document text
- https://ccaquebec.com/userupload/files/11848904774.pdfIn PDF document text
- http://www.ville-dammarie.com/ckfinder/userfiles/files/14303105472.pdfIn PDF document text
- http://bright-inter.com/file_media/file_image/file/66501114418.pdfIn PDF document text
- http://sosnovgeo.ru/userfiles/file/41770283081.pdfIn PDF document text
- http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/41027837165.pdfIn PDF document text
- http://giga.sk/storage/file/27779575633.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=herbier+marin+pdfPDF link annotation
- 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_off0000c877.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC877 | 10356 bytes |
SHA-256: 76f2eeabe31919d6b66f5287558ec1cbcf251d54729b003952df8e582c5f71b0 |
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font_01_sfnt_off0000df79.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDF79 | 18012 bytes |
SHA-256: 1ad85ba3ecb4d06a566cfd0a468530f8b3a1b1fe11f8ff27b33cd4bcc9848097 |
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font_02_sfnt_off00010dcb.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10DCB | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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