MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The ML classifier and ClamAV both strongly indicate maliciousness. The PDF contains a link farm with numerous URLs, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms points towards an attempt to redirect users to malicious sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9978
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://gdlianyu.com/uploadfiles/file/94487321775.pdf In PDF document text
- https://premiersuli.hu/files/files/barumisesobajatekizazoxip.pdfIn PDF document text
- https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608499369e6fb---77605770519.pdfIn PDF document text
- http://www.hangmandigital.com/files/file/57281550786.pdfIn PDF document text
- http://sbstroy53.ru/img/files/7282607980.pdfIn PDF document text
- http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/oov8s3leuq33pe80rhlcrguss7/kifejije.pdfIn PDF document text
- https://fruitssupplier.com/app/webroot/img/files/27055151041.pdfIn PDF document text
- http://cck-brno.cz/ckfinder/userfiles/files/97029000155.pdfIn PDF document text
- https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3ac59366d---22538216971.pdfIn PDF document text
- https://preprodpcb.com/userfiles/files/rapeko.pdfIn PDF document text
- http://asbazainville.org/userfiles/file/gixeduzepafezufese.pdfIn PDF document text
- http://euroambulans.pl/userfiles/file/pibowibusok.pdfIn PDF document text
- http://absolutelyneon.com/userfiles/file/zevazekuzudivowi.pdfIn PDF document text
- http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c657dd34e56---1748502033.pdfIn PDF document text
- https://deltaguvenlik.net/userfiles/file/zabumamekeluf.pdfIn PDF document text
- http://sangiorgioautoservizi.com/userfiles/files/11971941448.pdfIn PDF document text
- http://medtravel.lv/images/hand_uploaded/files/fomemowosizunamixusi.pdfIn PDF document text
- https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/f667422cc389a8786ef52b79a733e302/60464406182.pdfIn PDF document text
- https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/161120a6787e5a---neveraragibezipuroxi.pdfIn PDF document text
- https://alharithiforcameras.com/ckfinder/userfiles/files/domapatetejonotijabadat.pdfIn PDF document text
- https://pet-fashion.ro/mm/file/59599581385.pdfIn PDF document text
- https://betenagro.com/sites/default/files/file/23798367041.pdfIn PDF document text
- https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac8061991c---mupifukuzamudetu.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=national+geographic+traveler+vietnam+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_off0000cf6c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCF6C | 17756 bytes |
SHA-256: 89199084c7b3d3d231b47b25e44ff1d14826e4f81f1b0efc772620ffc3773494 |
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font_01_sfnt_off0000fd6c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFD6C | 10940 bytes |
SHA-256: 1852459cc25f07babac2666404178194a3a599dc5f968e1cba561c18d2faed9a |
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font_02_sfnt_off00011664.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11664 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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