MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external URIs and links to compromised WordPress upload storage, suggesting it is designed to redirect users to malicious sites. The presence of a link farm on disposable hosting further supports its role in distributing malware or conducting phishing attacks.
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://archism.ru/uplcv?utm_term=introduction+to+automata+theory+hopcroft+ullman+pdf
- http://frezerovka.by/images/fxeditor/file/bijapupaxewineniruv.pdf
- https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/82701b1bbe0493096394241cb3a34915/79812644848.pdf
- http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2a3b51325---gokivad.pdf
- https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609115228d712---3634591843.pdf
- http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a15027f37---28192229997.pdf
- https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/76vv9660c9k5a53u0b3dke3gtb/wilobokuwe.pdf
- http://strahovka66.ru/userfiles/file/10444151328.pdf
- https://karinbentum.nl/uploads/file/peperesatufuwakix.pdf
- https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/3rj3s9u39jtd1o5j3tik20g0hj/vofobanetixeganubuj.pdf
- https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/017jo2jrcs5d70dbc5mbotqjbs/bedojijowilidapulizazuwob.pdf
- https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/94444589803.pdf
- https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/07173323adbaf9e8b8474cd1da49e7b2/41560696080.pdf
- http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071fbb5da5d8---42380628496.pdf
- https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/e607b2qfvhg64a0m4n2pfhns3f/3966419053.pdf
- https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/81fef84f18054d2b1eba99558dbd77f0/6261536397.pdf
- https://contabil-fiscal.ro/mm/file/jexidovanowujisirof.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000ca7e.bin1d39f47ff92b4ed96c54c487e87f5e418ec2437ffdea38b7703cbd8a58025506 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCA7E | 5136 bytes |
font_01_sfnt_off0000dbc8.bind22e73c1b3c902897ec2f46d79b40c04ba18025f2bf536ec55019f55ddc54335 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDBC8 | 10472 bytes |
font_02_sfnt_off0000ff78.bin4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFF78 | 4324 bytes |
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