MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The 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 pointing to potentially compromised CMS uploads and disposable hosting, suggesting it's used for phishing or malware distribution. The embedded URLs, while numerous, do not provide a clear second-stage payload, but their nature strongly suggests a malicious redirection scheme.
Machine Learning
- Nyx PDF Classifier malicious score 0.9991
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 http://gagutp.com/sa_upload/userfiles/file/20210618085835.pdf In PDF document text
- http://mistral-paints.cz/userfiles/files/26192723557.pdfIn PDF document text
- https://wemservice.com/ckfinder/userfiles/files/kagas.pdfIn PDF document text
- http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160be63a4f08d9---24811111132.pdfIn PDF document text
- https://an-professional.ru/img/files/file/65343658767.pdfIn PDF document text
- http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b0689b1bc96---18774906866.pdfIn PDF document text
- https://bandotrading.com/uploads/file/mufet.pdfIn PDF document text
- http://burchiellati.com/file_fck/file/tekebukuzupamo.pdfIn PDF document text
- http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/xamivepu.pdfIn PDF document text
- https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/v6cgfl5ua4pj2vriggtimjj591/41512268500.pdfIn PDF document text
- https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/7ac82ac228b2b220837aaa7850add253/dupezawusivopu.pdfIn PDF document text
- https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/76b8b11ebdb48b5aca2950933ee69d3e/nizomojiwinid.pdfIn PDF document text
- http://k-yoga.org/file_upload/spaw_upload/file/20210515092323.pdfIn PDF document text
- http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/4648dfa2776c00d5cbf943f1239b3ff6/62574992017.pdfIn PDF document text
- http://bvsaigonbinhduong.vn/uploads/files/volofanuwonaruve.pdfIn PDF document text
- https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/379cbae7c40a612a9fc9f3f5171595ed/91759159563.pdfIn PDF document text
- https://yildizwebpaket.com/calisma2/files/uploads/42696620897.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=reasons+for+extreme+tirednessPDF link annotation
- 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_off0000ee9b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEE9B | 16868 bytes |
SHA-256: 67344bf7f3571ba4b4378ef46ffc6be5136947f0c101c9322d5fa5d9dcc94ec5 |
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font_01_sfnt_off00011a07.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11A07 | 10616 bytes |
SHA-256: 94a606b697b9cb0ccae54bc081c483eabfdcbd7b4ca00829efa145c141da1878 |
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font_02_sfnt_off00013254.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13254 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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