MALICIOUS
204
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains embedded JavaScript and numerous links, many pointing to compromised WordPress installations or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to exploit vulnerabilities or redirect users to malicious sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9992
Heuristics 8
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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 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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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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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://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a79a2646fab---riworarufakidunigop.pdf
- http://nessium.fr/userfiles/file/dujizalagalajaxinojox.pdf
- https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/56ba023463c0208bcaa69d5293fdc534/81803191008.pdf
- http://goldartline.ua/userfiles/file/7334811302.pdf
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a36fe7eeb---rugizosupudajiba.pdf
- https://okna-kurska.ru/page_edit/_samples/userfiles/files/xonemaxe.pdf
- http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da32d58c5f---nipewunawareguxilon.pdf
- https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/5276f72e7fd3905b170bf9612a82389f/nugowovuwixawuwewadit.pdf
- http://zezoalza.com/ckupload/files/bafera.pdf
- https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/ac7998cd3ec24dcbbc1a3adcace9630c/sizozunowisamixu.pdf
- http://ijdssymposium.eu/upload/64614935486.pdf
- https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/46f54b495b084712f21240f36323acb9/56647860437.pdf
- https://kede.org/userfiles/file/54237501003.pdf
- http://fkjz.cn/upload/files/2021/06/202106260211297859.pdf
- http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad91cbb1b40---11299154598.pdf
- https://codecs.roimages/file/lisulimidugizizisubule.pdf
- http://tipkeo.com/js/ckfinder/userfiles/files/jefegugikarab.pdf
- http://ciaooo.ru/uploades/userfiles/file/20492973156.pdf
- https://bhandarisurgical.com/ckfinder/userfiles/files/20224892672.pdf
- https://childrencareandliteracysociety.org/userfiles/files/91435370380.pdf
- https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=renaissance+architecture+in+italy+pdf
- 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_off0000e25c.bin2b1da8b415e4ad85e6b7521e1bade8d280ff5746def9a50953141e4924e70d16 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE25C | 18620 bytes |
font_01_sfnt_off0001121f.binaf2ede3b63db3cf3414006d15c2eeccdf70a36022959737012f7b268a7b53620 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1121F | 10856 bytes |
font_02_sfnt_off00012b26.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12B26 | 16792 bytes |
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