MALICIOUS
104
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript, indicating an attempt to execute malicious code. It also features a large number of external URIs, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content or download further payloads. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9975
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://crewmak.ru/uplcv?utm_term=sliding+scale+insulin+chart+pdf PDF link annotation
- http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b051e662759---53832325152.pdfIn PDF document text
- http://satyavnetworks.com/fck_upload_images/file/fijufa.pdfIn PDF document text
- https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/53c5878b82768b706e070bdc4c598ddc/98928549938.pdfIn PDF document text
- http://hum-lucknow.org/test/fckeditor/file/gogeliweregamebezugobigex.pdfIn PDF document text
- http://texmet.pl/userimages/file/saremotevisiniwo.pdfIn PDF document text
- https://pima-alarms.net/slicice/file/74307698340.pdfIn PDF document text
- http://ongnuocdenhat.com/upload/files/47031040289.pdfIn PDF document text
- http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608762e94d32c---51807205550.pdfIn PDF document text
- https://pmfegypt.com/userfiles/files/1532962378.pdfIn PDF document text
- http://klubbelgickychobrov.sk/editor_uploads/files/xidofemojulamowowovodunuv.pdfIn PDF document text
- https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/76df00d04632f83c6603254312cab17f/39511173124.pdfIn PDF document text
- http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609215994dcd8---zasevujav.pdfIn PDF document text
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe67c2a623---wakubirasivesuxog.pdfIn PDF document text
- https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/cfe035cce986e298417907ffe6abfdba/rugodukosadunopunezabe.pdfIn PDF document text
- http://gaziogluenerji.com/images_upload/files/rorule.pdfIn PDF document text
- http://lexus-custom.com/js/upload/files/titot.pdfIn PDF document text
- http://cpgny.com/userfiles/files/xizawizulor.pdfIn PDF document text
- https://aspaeng.com/files/image/files/35223965678.pdfIn PDF document text
- https://tedvandergulik.nl/userimages/file/23789372974.pdfIn PDF document text
- http://aggengr.com/uploads/CMS/file/jalulosasa.pdfIn PDF document text
- http://www.gesas.it/media/mailinglist/file/vosawibukalurazitikovoril.pdfIn PDF document text
- http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/599e400162f94b9f861c34a4296b206d/12126773873.pdfIn PDF document text
- https://m-isc.com/userfiles/file/fiwapapewobawerokijinuj.pdfIn PDF document text
- http://dentherapia.hu/files/file/tedaj.pdfIn PDF document text
- http://yuhenganquan.com/userfiles/file/20210624210347_157911467.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000b7be.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB7BE | 15524 bytes |
SHA-256: d0a19ab8ea2fe2d8242a01a63abb670c53d38775b345e7a0759a50ad66f7ad6d |
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font_01_sfnt_off0000df81.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDF81 | 10956 bytes |
SHA-256: 0649cfb703614ebf8738fe2cf20b5df750f782775cc5980930a2dc1a94837080 |
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font_02_sfnt_off0000f89d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF89D | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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