MALICIOUS
204
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample is a PDF document that contains embedded JavaScript and numerous external links, many of which point to compromised WordPress sites hosting other PDFs. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content likely prompts the user to install a browser extension or update. This, combined with the ML classifier and ClamAV detection, strongly suggests a phishing or malware delivery attempt. The embedded JavaScript may be used to further obfuscate the malicious intent or initiate a download.
Machine Learning
- Nyx PDF Classifier malicious score 0.9628
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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Browser extension / update installation lure high SE_BROWSER_INSTALL_LUREDocument tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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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 https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717c6ae1911---sexosegezuredef.pdf
- http://adamlegal.com/userfiles/file/45634354208.pdf
- http://soepcentrale-dekeyser.be/userfiles/file/45487300803.pdf
- http://rentbucharest.net/images/userfiles/zowimugakokigarawodaven.pdf
- http://boldino-hotel.com/ckfinder/userfiles/files/3975080853.pdf
- http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16073595df2dee---32120099334.pdf
- https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d9459df1a---vewujarebimaguxix.pdf
- http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/1fcb2f1dbe3a1530518ac791e352f6eb/47099725574.pdf
- http://stsmcc.org/www/js/ckfinder/userfiles/files/9987077809.pdf
- http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ff4c857be31---gavorit.pdf
- http://altelaw.com/uploads/image/file/98437067661.pdf
- https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b75295dfb---5062529687.pdf
- https://adikkedua.com/contents//files/8334178250.pdf
- http://afgventuregroup.com/cfiles/file/nisodizodejemilojozenon.pdf
- http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cbdbeb0c487---46065034231.pdf
- https://x-software.cz/data/file/bituvub.pdf
- https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610393d523ac4---xabixod.pdf
- https://penal-garazh.ru/files/fotokojikurolomowokeji.pdf
- http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081dada31dab---8643663334.pdf
- http://vinag7furniture.com/app/webroot/files/editor_upload/files/75468709288.pdf
- http://booklandbooks.com/userfiles/file/pibasalijilo.pdf
- http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5s22pcd9ds4b5261lqgpkvgdv1/45732383871.pdf
- http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1609b76139f97c---fejupasusejobanemux.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=ppsspp+best+fighting+games+list
- 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 |
|---|---|---|---|
stream_009_off00024d9a.bin51f759539ded29aada3f7f72fe377a19c1bcb521ed55937c691eb41ca2505866 |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0x24D9A | 16852 bytes |
font_00_sfnt_off0001ecc6.bina9c459ad7790b14fe7e9c916374dc4aa84ea2141a883161636ac51e7ba36edeb |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1ECC6 | 18544 bytes |
font_01_sfnt_off00021d4b.bin281122152296ac915129bac7266c0ce251f042997eb77719f7c28a89c16acfeb |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x21D4B | 10728 bytes |
font_02_sfnt_off00023589.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x23589 | 16792 bytes |
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