MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 User Execution: Malicious File
This PDF file 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 hosted on compromised WordPress installations, suggesting a phishing or redirection scheme. The document body, though heavily obfuscated, appears to be a lure related to 'machine learning lecture pdf', aiming to trick users into visiting these malicious URLs.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
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://pistant.ru/uplcv?utm_term=machine+learning+lecture+pdf PDF link annotation
- https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/b1faff4b4d2e21d1706c5cb7464a5db7/87961520661.pdfIn PDF document text
- https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/ec649c6aba29a778d3fb7b1b508592d4/gazegenixisojujudu.pdfIn PDF document text
- http://tsg-edinstvo.ru/userfiles/file/26538705634.pdfIn PDF document text
- https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9b0f380b3---99649971853.pdfIn PDF document text
- https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/v1oia9jmlubarkurp93uh7jbq0/86848136441.pdfIn PDF document text
- http://robertfeinberglaw.com/images/edit_images/file/wupexim.pdfIn PDF document text
- https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/80571f702b30a233d61044e4da21aa45/80100199609.pdfIn PDF document text
- http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072478cc9143---71740132392.pdfIn PDF document text
- https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608606a5ac76f---gejekusuvavikevakazupora.pdfIn PDF document text
- http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609467de458b1---90343316961.pdfIn PDF document text
- https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ieq3f92b8orqhbspsgmrv8b0c0/baparumofew.pdfIn PDF document text
- https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8389bddac---92230893046.pdfIn PDF document text
- https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757a4fe3049---22452702756.pdfIn PDF document text
- http://vinmexindia.com/uploads/49433037518.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000ca7c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCA7C | 5244 bytes |
SHA-256: 71ab458af9ba3459c790aff7c8f2f301e585a4cb4dbb87f5f7f83296560782a8 |
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font_01_sfnt_off0000dc5b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDC5B | 10496 bytes |
SHA-256: 8ec0157759a07fa848e42e29c858aab89e360831b93503533bd026b3e2c7884b |
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