MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this attack pattern.
Machine Learning
- Nyx PDF Classifier malicious score 0.9951
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 https://crysiq.ru/uplcv?utm_term=look+at+the+picture+and+write+the+correct+letter
- https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/2a2e8e0808eef0de1ccd6a68f243664e/24161285757.pdf
- https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/c167f2b80187954a1f4e0307862549ca/xames.pdf
- http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718a64566f9---53211966665.pdf
- http://outspokenholland.com/userfiles/fckFile/20210611033137.pdf
- https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16095d7899da46---bubixuvavavesaduzoj.pdf
- http://toyotaquangninh.org/data/dulieu/files/28759877405.pdf
- http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dc988ff39c326518ab6f1174cee29305/54369922864.pdf
- https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7c3e86776---bamulobesipekenuli.pdf
- https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/bac2d9cf08036017be42f4fbdefb6ae2/68550327061.pdf
- http://msamerica.net/clients/873634/File/13362496646.pdf
- http://hpworld.hu/data/pic/Image/file/rireletorituvaxup.pdf
- http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a16378a83---15140875767.pdf
- https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e054d04025---molurubejulujun.pdf
- http://hasici-pristroje-eshop.cz/files/file/mezopuvotofopuxuwufibe.pdf
- http://langfordfinancialservices.com/userfiles/files/mepuposozowipo.pdf
- https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/pjcqg72phcjb4khg27p0f5o2mq/zujafi.pdf
- https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/01b7d8e96587e37be97cfbab4cddc5c8/11477050951.pdf
- https://balbok.net/admin/ckfinder/userfiles/files/pidutetetopi.pdf
- https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/11566be05f2d6cdb89bb3cca3df97cda/65207717018.pdf
- https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/eo3otrrclc9rptt97aie26are1/23256935395.pdf
- http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a31863ddede---80670166081.pdf
- https://tonitomov.com/picture/file/27229389990.pdf
- http://goldartline.ua/userfiles/file/94429170906.pdf
- http://alexhoffordphotography.com/temp/files/file/34220087279.pdf
- http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/11829c9ba1198da41eac2ed2615d7cdc/16022971613.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_off0000e391.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE391 | 16792 bytes |
font_01_sfnt_off0000fba3.bin7db5d9114599c58761c59a318bdb3123ccb32758f0db529b605a37a5b7d4e4bc |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFBA3 | 17556 bytes |
font_02_sfnt_off00012848.bin69c25aff61c11d81fcc22ce289ad47b382208cdef9cdcf2e198d0031b15ec1d1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12848 | 10680 bytes |
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