MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The file is identified as malicious by ML classifiers and ClamAV. It contains numerous URLs, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a tactic to obscure malicious links. The primary attack pattern involves directing users to external PDF files, likely as a phishing or malware distribution vector.
Machine Learning
- Nyx PDF Classifier malicious score 0.9982
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 https://smidgel.ru/uplcv?utm_term=cell+membrane+and+tonicity+worksheet+key.pdf PDF link annotation
- http://odumakus.com/uploads/files/17882261669.pdfIn PDF document text
- http://peusch.lu/userfiles/files/fuboted.pdfIn PDF document text
- http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6b8bb0dfa---wawadixisagatu.pdfIn PDF document text
- http://osoboebludo.com/ckfinder/userfiles/files/fikiwasubawe.pdfIn PDF document text
- http://lorichphoto.com/pictures/file/67861860188.pdfIn PDF document text
- https://gabconstruction.com/ckfinder/userfiles/files/bobololije.pdfIn PDF document text
- http://erictex.com/ufiles/files/35124430692.pdfIn PDF document text
- https://permargi.com/files/galeria/files/65873334462.pdfIn PDF document text
- https://zenmobile.in/jaipriyart/uploads/files/1108525108.pdfIn PDF document text
- https://reparationmobile.net/userfiles/file/29738407941.pdfIn PDF document text
- https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/6fdfa01d822fd6f7a4e83743532f9f62/terekabenojowivufakukewod.pdfIn PDF document text
- http://riccaassociati.eu/userfiles/files/47471829419.pdfIn PDF document text
- http://www.gonouvellezelande.com/files/55897486200.pdfIn PDF document text
- https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e83dacdd086---38857697013.pdfIn PDF document text
- http://telegid.tv/userfiles/files/17352299594.pdfIn PDF document text
- http://srtprogetti.eu/userfiles/files/33291642063.pdfIn PDF document text
- http://aucoindeshalles.com/menu/file/vemim.pdfIn PDF document text
- http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160816d0cdd359---mujopawagilonawu.pdfIn PDF document text
- https://agape4u.org/userfiles/file/61006780811.pdfIn PDF document text
- http://buergerforum-tirol.at/file/19459303848.pdfIn PDF document text
- http://velo.hu/UserFiles//file/69516090067.pdfIn PDF document text
- https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/ee623e964b1f636f5cb8ff11fea56315/5194565131.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_off0000b54b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB54B | 15548 bytes |
SHA-256: 0825b3f50054fe508edcca3de45a1c3c25c984bdac8d1aa6acbd6757c869f7df |
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font_01_sfnt_off0000dcd6.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDCD6 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off0000f4ed.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF4ED | 11412 bytes |
SHA-256: 79497057a635c515bdd5345d673110675611e63d4b716479042d7cfc5eb3280c |
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