MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous embedded URLs pointing to various domains, some of which are hosted on compromised WordPress sites. The presence of 'utm_term' parameters suggests a phishing or SEO-based lure to entice users to click on these links, which likely lead to further malicious content or exploits.
Machine Learning
- Nyx PDF Classifier malicious score 0.9960
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://synerhu.ru/uplcv?utm_term=adult+comics+free+pdf PDF link annotation
- https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/8884d0baa922a75528ed77a054bc0b54/10688668012.pdfIn PDF document text
- http://metall-press.ru/files/delebojitozeleronoboxu.pdfIn PDF document text
- http://yey.uw52.com/upload/files/lujekowisi.pdfIn PDF document text
- http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/bibotunevuwub.pdfIn PDF document text
- http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf22197577---45824227323.pdfIn PDF document text
- https://agrimal.pl/userfiles/file/71717400598.pdfIn PDF document text
- https://shidoremicrosys.com/media/bamopagidenabofi.pdfIn PDF document text
- http://duancanhotot.com/upload/files/futuxifizelepopofebalop.pdfIn PDF document text
- http://tomgiongvip.com/uploads/files/file/17085233205.pdfIn PDF document text
- https://vnsteeldetailing.com/UserFiles/files/65489083641.pdfIn PDF document text
- https://internationalmedia.com/userfiles/file/69686687218.pdfIn PDF document text
- http://sumisaedu.com/FileData/ckfinder/files/20210910_7A0F4EED6EDE5143.pdfIn PDF document text
- http://bhttourist.com/upload/fckimagesfile/gasitigakexisopi.pdfIn PDF document text
- http://sspvjd.com/FileData/ckfinder/files/20210906_AE789B6194A1968B.pdfIn PDF document text
- https://www.wappa.com.au/siteadmin/ckfinder/userfiles/files/nulefevarelovosifa.pdfIn PDF document text
- http://www.eau-msu.ru/ckfinder/userfiles/files/88581325292.pdfIn PDF document text
- http://a2hgghk.handylover.com/upload/files/bopaguremora.pdfIn PDF document text
- https://tidurmalam2.com/contents/files/6425699929.pdfIn PDF document text
- https://nullemont.fr/nullemont/ckfinder/userfiles/files/22719158105.pdfIn PDF document text
- http://wxdyzs.com/userfiles/files/15021719331.pdfIn PDF document text
- http://www.mmd.ntou.edu.tw/ckfinder/userfiles/files/75364680002.pdfIn PDF document text
- http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16138d8318034c---64077045241.pdfIn PDF document text
- http://semihkerpiccilervesupersound.com/upload/file/78863872835.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_off0000da84.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDA84 | 17428 bytes |
SHA-256: 8df8db7bd61ecc0c25632ece07554543cea94a85735e169a17532cac2a1c26df |
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font_01_sfnt_off000107ec.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x107EC | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off00012003.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12003 | 10596 bytes |
SHA-256: 2f56ad769f6f8337cc14093c52aef927e57679d95820b4037e79a6f0dd2a5e0d |
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