MALICIOUS
216
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF is designed as a screenshot lure, presenting itself as an image to trick users into clicking a link. This link directs to a malicious PDF hosted on a compromised WordPress site, indicated by multiple heuristics flagging compromised CMS uploads and link farms. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a phishing or malware payload.
Machine Learning
- Nyx PDF Classifier malicious score 0.9837
Heuristics 8
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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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Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LUREPDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 70 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
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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://krisoc.ru/uplcv?utm_term=proposed+constitution+of+the+federal+republic+of+the+philippines+pdf PDF link annotation
- https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607274f20e796---20208934473.pdfIn PDF document text
- https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/c5b5d6201fccd23b996854f8c9f92441/liginop.pdfIn PDF document text
- https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7a2b96b0c---giwolufujitofam.pdfIn PDF document text
- http://brno-skoleni.cz/ckfinder/userfiles/files/jorarosuxoradawilipenix.pdfIn PDF document text
- http://omak1968.com/clients/71178/File/lararesesu.pdfIn PDF document text
- https://muratay.nl/userfiles/file/jupitejezix.pdfIn PDF document text
- https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/6ad928b383e688487eff0f416728a9d0/12339861669.pdfIn PDF document text
- https://moveo-sport.pl/userfiles/file/ninexuvexajakodoxobebim.pdfIn PDF document text
- http://tillmanfamilyreunion.com/clients/b/b7/b7385abc5988d1ee605fea7695e3d00e/File/woperafiwefexijosoposapeb.pdfIn PDF document text
- http://kokomo1986.com/clients/31029/File/71621788026.pdfIn PDF document text
- http://eltprof.ru/userfiles/file/61719402033.pdfIn PDF document text
- http://basyapiemlak.com/yukleme_klasoru/userfiles/file/29321711687.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/fce4e2592d38b5f8a4c565cfc0c1683d/36767974974.pdfIn PDF document text
- http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beeee27d66b---vivujo.pdfIn PDF document text
- http://zatoodesign.com/userfiles/files/pebimemajozogumowamaxeko.pdfIn PDF document text
- http://robedecreateur.com/img/files/vizurosekin.pdfIn PDF document text
- https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/9850196f408ab6532a082d5d3cb99ed0/94385905426.pdfIn PDF document text
- https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/569b4d927eb1a414d0c304f677c192b2/valusuxoxu.pdfIn PDF document text
- https://augsburger-dartliga.de/uploads/file/tebopiw.pdfIn PDF document text
- http://m2m2design.com/userfiles/34231331707.pdfIn PDF document text
- http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/haivhbc2qcdrvtle6ae8j74at1/piteginibonavorekedalusu.pdfIn PDF document text
- http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/uurl7thpm5mckcefa72ga05sr2/vorogobemomeranolo.pdfIn PDF document text
- https://vrindaindia.com/php/joseph/uploads/file/rebapetosewumolifokodu.pdfIn PDF document text
- http://csim.jp/ckeditor/uploads/files/7990646137.pdfIn PDF document text
- http://wlpp.net/images/blog/file/bejalof.pdfIn PDF document text
- https://trunglamdecor.com/uploads/userfiles/file/2040197665.pdfIn PDF document text
- http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/16ae9816b9087104ac41f7cf4f625c05/gobage.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_off0000b46e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB46E | 10956 bytes |
SHA-256: 66534ec8f755c156048d266490a0774502eb1bb2b8a3fce216e54cb5aa3f5f2e |
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font_01_sfnt_off0000cd89.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCD89 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off0000e59b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE59B | 14440 bytes |
SHA-256: 2e5b34db63cf0bbeb76f429e3f928ece6f12700ee9b98ab2a113768e0d95f637 |
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