MALICIOUS
104
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress upload directories or disposable hosting. These links likely serve as a link farm to redirect users to malicious content or download further payloads. The ML classifier strongly indicated maliciousness, supporting the assessment of a malicious PDF downloader.
Machine Learning
- Nyx PDF Classifier malicious score 0.9919
Heuristics 6
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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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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://garglob.ru/uplcv?utm_term=ejercicios+sobre+el+uso+de+las+mayusculas+para+primaria
- http://lynhuagiasi.com/Images_upload/files/kukejilunivi.pdf
- http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608229c780b4d---55211674248.pdf
- https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9807dcae9a---43210456744.pdf
- https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984a920a772---29113297693.pdf
- http://ssp.by/var/upload/mukikuwonok.pdf
- http://conomiya.com/images/uploadedimages/file/13795293810.pdf
- https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/65c9ba141fa4a05c74ccf5ae1add6fc3/dumopuno.pdf
- http://m-styleauto.com/js/upload/files/rufoleguberifo.pdf
- http://srsheicha.com/uploadfile/file/butuvonegu.pdf
- http://universalestetic.com/userfiles/file/sovosilazawizomagif.pdf
- https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/2i9jgu65qosvdd42min4qapv9t/65289507109.pdf
- https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/6879e5d677eca8faa0dd3f6c9ec4b53f/monawujozokukajuwedo.pdf
- https://faktxeber.com/resimler/files/lanokiximosuxegivowuxez.pdf
- http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098a5427fecd---56231535201.pdf
- http://firmen-bekleidung.at/userfiles/file/sovunaxoreranerex.pdf
- https://fonixkoncert.hu/upload/file/kevopifukom.pdf
- https://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/xivazonuwal.pdf
- http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16085d22888fa2---76656134909.pdf
- https://asharfilalkulfi.com/ckfinder/userfiles/files/778433771.pdf
- http://jnafarms.com/clients/864068/File/pepojadiguveporosugupi.pdf
- http://canadapremiumlubes.com/survey/userfiles/files/64502014962.pdf
- https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/81ab8da496f819813e0f89e62870e33e/kuxusudaxitujurajipel.pdf
- https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/rtl878gkk7vfvd0722d1ei84mh/pudewuwawipowa.pdf
- http://classtool.info/upload/files/60564787998.pdf
- http://change4best.ru/upload/file/37819997250.pdf
- http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e6ade5f1336---70138601031.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_off0000e452.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE452 | 16792 bytes |
font_01_sfnt_off0000fc69.binf6d18428293e397953adb6b0c352ac11567aa05fd019b9240c7f12a29441ebad |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFC69 | 10940 bytes |
font_02_sfnt_off00011580.bin0e0eac1879e6f507897f5a4985f62e851bfd0222558e95da88e1446bbfc827af |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11580 | 18012 bytes |
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