MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.
Machine Learning
- Nyx PDF Classifier malicious score 0.9991
Heuristics 6
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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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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://hoya-system.com/uploads/files/202109021456223002.pdf In PDF document text
- https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c0b02e9ba---70721927451.pdfIn PDF document text
- http://lnyuanzong.com/uploads/files/20210914022040.pdfIn PDF document text
- https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/l417blnnnlckt7b7vbgbi6etke/potavat.pdfIn PDF document text
- http://www.peritaonline.es/ckfinder/userfiles/files/movijitawokovejiguwusemu.pdfIn PDF document text
- http://stfurnimart.com/file_media/file_image/file/24133333174.pdfIn PDF document text
- https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/vavipomuvulomukudetegosu.pdfIn PDF document text
- https://ibexquimica.com.br/ckfinder/userfiles/files/31827185995.pdfIn PDF document text
- https://chambres-lannion.fr/userfiles/file/nasamenosakokuwosuverekiz.pdfIn PDF document text
- https://cecprint.com/images/file/83318671431.pdfIn PDF document text
- https://bahamianbrewery.com/ckfinder/userfiles/files/98556468122.pdfIn PDF document text
- https://nutstudio.it/userfiles/file/lajaparerefo.pdfIn PDF document text
- http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/161351dc43b2c4---roguridez.pdfIn PDF document text
- http://elmbbq.com/uploads/files/funekibarodumadet.pdfIn PDF document text
- http://longarmquiltacademy.net/fckeditor/userfiles/file/wuturipujirarovukalujisu.pdfIn PDF document text
- https://support-trevianum.nl/userfiles/files/dumuxedunulodavubuzajamu.pdfIn PDF document text
- https://regionalhealthprogramsww.com/images/file/45309823515.pdfIn PDF document text
- http://finalbrand.cz/upload/file/viranero.pdfIn PDF document text
- http://marsalanoleggio.it/userfiles/files/57532529787.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=why+are+my+text+messages+delayed+androidPDF 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_off0000d600.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD600 | 10904 bytes |
SHA-256: 57eb0f9f2ac9e2ce0f34d42e826fd75d4d1f96454bc5c7bcd2f992f53bd06160 |
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font_01_sfnt_off0000eee5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEEE5 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off000106f7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x106F7 | 18172 bytes |
SHA-256: 26bed754cfa23d842409fc1b5c33b82f389784c840b5135ff2dc56e2f814a3c1 |
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