MALICIOUS
96
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains a link farm that points to numerous domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to artificially inflate search engine rankings by distributing links across many domains. The ML classifier also strongly flagged this PDF as malicious, suggesting it's part of a larger malicious infrastructure.
Machine Learning
- Nyx PDF Classifier malicious score 0.9912
Heuristics 5
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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://handbook.hu/upload/page/file/15106552282.pdf
- http://aeusjtu.pretty-match.com/upload/files/78723553879.pdf
- http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a3d13a283---duwixiwa.pdf
- https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/f279378a49959a349e4743c757404fd2/voxuzelegejimepekenadagud.pdf
- https://himanshikitchen.info/viking1/uploads/files/37661375527.pdf
- http://brooklinehs1964.com/clients/6/6a/6a3559cec3eb17f551da2d864c8c85ab/File/gojiwimabefaj.pdf
- http://www.advokat.com/app/webroot/img/fck/file/48923760137.pdf
- https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/cee1da8027a775bde42d01ab94fbe31f/babubaso.pdf
- http://hoinhikhoavn.com/img/files/moxogixawozizi.pdf
- https://autosaloncenter.com/uploads/file/26677029933.pdf
- https://xn--90aoja6ahg5ds.xn--p1ai/uploads/files/74353792490.pdf
- http://kolasinprevoz.rs/slike/files/japomokugogebu.pdf
- https://98ing.com/upload/ck/files/20210709_211132.pdf
- http://feach.ie/images/uploads/file/39489151686.pdf
- https://sitpchemcieszyn.pl/_sitpchem/file/46248916642.pdf
- http://divorcefinance.nl/uploads//file/waboru.pdf
- http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a67c30483c9---23630667012.pdf
- https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/941c09639d4ce5369909fab630f71247/kozige.pdf
- http://abhinavabhishad.org/userfiles/file/55911843623.pdf
- http://1984wnhs.com/clients/2/25/250e0aaa51dad033202e6c34d8602b4d/File/jepimazogorixibaritalej.pdf
- http://progfin.pl/userfiles/file/keliw.pdf
- http://popnmusic.fr/userfiles/file/penisoguvetafofasodofoge.pdf
- http://nelly-design.ru/upload/files/76045257820.pdf
- http://anhuizpyy.com/upload_fck/file/2021-5-1/20210501042643956986.pdf
- http://agendatourvietnam.com/hinhanh/file/bebagevulugi.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=nonverbal+communication+in+counselling+pdf
- http://s292376414.onlinehome.fr/datas/imgmail/file/64575431129.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_off0000e33a.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE33A | 16792 bytes |
font_01_sfnt_off0000fb4c.binb4bc39122628c7a44d02cd23aa592e240ac262a8c2180a854a8485595db8d98e |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFB4C | 16816 bytes |
font_02_sfnt_off00012715.bin99ae2b3b04aa9071342759cfeaea60a758bc98dea68c346f2df0f4d58a3856d3 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12715 | 11244 bytes |
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