MALICIOUS
96
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF sample was flagged by an ML classifier as malicious. It contains numerous embedded URLs that form a link farm, many pointing to compromised WordPress sites. The primary purpose appears to be redirecting users through these compromised hosts, likely as a step in a phishing or malware distribution chain. No scripts were extracted, but the presence of a link farm suggests an attempt to lure users to external malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9942
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 https://krisoc.ru/uplcv?utm_term=bellwether+states+2020
- https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/a34291f98bce898b93b0ad2c253a887a/71562136945.pdf
- http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ab694d46796---55809717658.pdf
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c13e77a2f72---80948080629.pdf
- https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/7703adc5fa2cac3ec7ba5c5c561c2172/reban.pdf
- https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/e2shauam5vumjtv86bikrh756m/10188915446.pdf
- https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a5d1e9b22---3360582686.pdf
- https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/c79a4b6af716db7a482a8b615c7be6e8/46459788230.pdf
- http://www.tobywells.org/media/fckdir/file/dizazakixaxunevifusakajo.pdf
- http://1970lions.com/clients/5/57/57eb30a5877ba0c7834658d164206012/File/42773053132.pdf
- http://nhs1980alumni.com/clients/878257/File/revororaladis.pdf
- https://hitourkorea.com/FileData/ckfinder/files/20210607_1D2DA83496AA4359.pdf
- http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/nqc98tbeegk61oqd3ptj74hbm2/5636253903.pdf
- https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/66ae422dab79b064cb57c080bdca5e1b/robibadoparoxare.pdf
- http://uptownchantilly.com/uploads/files/97495605859.pdf
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2dbb7cdfeb---digitaragebigajagixugesed.pdf
- http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b82382e6fe6---35379999564.pdf
- https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/bbkim1gv05g4i88beklq466sjs/15323961014.pdf
- http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c187a6894---vujixurifapi.pdf
- https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789829ac6db---39422350027.pdf
- http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8b6042075---likakivenilijeropog.pdf
- http://antifftech.com/uploadfile/file///2021050505144640.pdf
- http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db76731c4f0---57046786118.pdf
- http://cortabellanews.com/userimages/xewegusivuvovekuvolu.pdf
- https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/8f8e23025f55ec2d2649dcae8b9cfd8d/mezanazuralofowisi.pdf
- https://aduanaldelvalle.com/userfiles/file/27466519003.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_off0000fa64.bin06b73e88b3c2573262ce4ece48d5abd8f7ee7b2a04eb67fcaab49f27e6d7ac9c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFA64 | 10268 bytes |
font_01_sfnt_off000111db.bin05776a9eed5a99cec02b974b6445c34295e24f7fed6acd7718ad8b747b1c7d74 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x111DB | 16568 bytes |
font_02_sfnt_off00013cf6.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13CF6 | 16792 bytes |
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