MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to various PDF files hosted on compromised WordPress sites, masquerading as an 'english study guide pdf' via UTM parameters. The heuristic 'SE_INVOICE_LURE' suggests a deceptive lure, likely to trick users into downloading the linked malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9822
Heuristics 7
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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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Fake invoice / payment lure low SE_INVOICE_LUREDocument contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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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://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161375b696508b---xutosekotanapapulemojipa.pdf
- https://baatco.com/ckfinder/userfiles/files/76548358347.pdf
- http://spain-ex.com/images/blog/file/34115423099.pdf
- https://emons-verlag.com/testarea/cwsCMSlight/media/files/navobigev.pdf
- http://tchid.net/userfiles/file/tegazivobetiwav.pdf
- https://rotitelor.com/contents/files/54227245793.pdf
- http://hidrometa.com/images_upload/files/57049029475.pdf
- https://togelunited4d.com/contents/files/14215580160.pdf
- http://greenearthgardens.org/userfiles/73764080351.pdf
- https://maurinet.com/userfiles/file/37293543703.pdf
- https://liepasmuiza.lv/userfiles/library/58579900493.pdf
- https://dichvuketoanvn.org/uploads/files/xilimiguzujozarixogisez.pdf
- http://benhvienlaptop.biz/userfiles/file/37345622226.pdf
- https://semagro-msw.ru/pics/images/file/fuxobunisunepu.pdf
- https://mayphoviet.com/media/ftp/file/kolipukupusedakedideno.pdf
- https://sklep-pinokio.pl/web/uploads/files/71048405742.pdf
- http://oio.cn/uploadfiles/files/duxadenokaj.pdf
- https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/5bac21078d9e9ef638286774f0006f8c/turilagomosezitupasirune.pdf
- http://kagoshimakojintaxi.com/userfiles/file/2688066906.pdf
- http://slenderclub.cz/ckfinder/userfiles/files/47867772775.pdf
- https://europacreativaeuskadi.eu/files/galeria/files/nogekimezaxewamiralufetu.pdf
- http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/4t1bc477e61de438e3rt6i8sv7/kezorefuputaka.pdf
- http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/kumusepofezof.pdf
- http://www.lircai.com/web/inline/file/webetijasedixum.pdf
- https://rent-1.es/ckfinder/userfiles/files/nudon.pdf
- https://best-label.com/upload/files/togutisidud.pdf
- http://ageddfjtjgrade.pretty-match.com/upload/files/63038601965.pdf
- https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=english+study+guide+pdf
- 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://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000f6f1.bin404abd5761125dc6dcf8a8f6ad71483155ee4ff5460621111fea438675a3fd1f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF6F1 | 10592 bytes |
font_01_sfnt_off00010ed1.bin4aaee06c9203d81ebc7bf416be540c171c60fee3fda33ee7e42b682f9707e8c8 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10ED1 | 17660 bytes |
font_02_sfnt_off00013cf4.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13CF4 | 16792 bytes |
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