MALICIOUS
174
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample is a PDF containing embedded JavaScript and multiple links to external resources, many hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick the user into downloading a second-stage payload. The PDF_RANDOM_URL_LINK heuristic firing points to a specific malicious URL that is included as an IOC.
Machine Learning
- Nyx PDF Classifier malicious score 0.9975
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 to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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://alteredcompta.com/buddha/ckfinder/userfiles/files/rupuniwosiso.pdf In PDF document text
- http://studio-castiglioni.com/userfiles/files/xezijezolapumegusumavugav.pdfIn PDF document text
- http://charolais-hessen.de/write/userfiles/file/rakiwidifimamelav.pdfIn PDF document text
- http://www.autoservis-hubatka.cz/admin/upload/ww/file/35128915046.pdfIn PDF document text
- https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/dbccfcc7f293d3dfbdb2f4bd471c29b7/witid.pdfIn PDF document text
- http://canhtoanland.com/upload/files/64305769470.pdfIn PDF document text
- http://www.monts.sk/upload_images/file/862705277.pdfIn PDF document text
- https://baruipur.org/ckfinder/userfiles/files/65944638943.pdfIn PDF document text
- http://ls12368.com/userfiles/file/32161017976.pdfIn PDF document text
- http://kimhoatra.vn/upload/fckimagesfile/17331227981.pdfIn PDF document text
- http://recuva.kr/upload/fck_img/1630905142/file/suromurajamekej.pdfIn PDF document text
- http://iiiemjobs.com/FCK_Editor_Images/files/71517581203.pdfIn PDF document text
- http://webinaris.blog/ckfinder/userfiles/publics/files/55185765701.pdfIn PDF document text
- http://marmaraisg.com/images_upload/files/menabakilabipino.pdfIn PDF document text
- http://96stone.ru/userfiles/file/84205495438.pdfIn PDF document text
- http://pagyesa.org/userfiles/file/20210914185016.pdfIn PDF document text
- http://carraracucinecomponibilitrapani.it/userfiles/files/54279474457.pdfIn PDF document text
- https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614118e25255c---falamujixikenebivexuv.pdfIn PDF document text
- https://ratsimae.ee/media/contents/file/79504611628.pdfIn PDF document text
- https://aedwea.com/upload/foto/gipirabubutuva.pdfIn PDF document text
- https://arabadvertise.com/userfiles/files/68617053196.pdfIn PDF document text
- https://tl-systems.hu/files/files/97799855949.pdfIn PDF document text
- https://cicadit.ro/UserFiles/file/12320587031.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=unfold+gratis+apkPDF link annotation
- https://www.assessment.unibe.ch/app/webroot/js/ckfinder/userfiles/files/88768735823.pdfIn PDF document text
- 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_off0000b567.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB567 | 10640 bytes |
SHA-256: 76aaf6e824d7d8dfac70e6cdcefb883eba89156999e519112ba0e974e463d7f2 |
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font_01_sfnt_off0000cda2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCDA2 | 17012 bytes |
SHA-256: e2f42aa08d0afa571606329e64fc0fac0970d81aa2e08a0479c3614a60052a48 |
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font_02_sfnt_off0000f8e9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF8E9 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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