PDF malware analysis — malicious · 10ceab292631a846

MALICIOUS

PDF

86.3 KB Created: 2021-08-17 12:38:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: d7feedaa2fb0c6e2ccc2f922d78e6dee SHA-1: f035814f81efb8233c501babd71bc7f02a795834 SHA-256: 10ceab292631a846210e69b1498595bd1b0fa2b6b26e48ad03643d77133de667

104 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised WordPress sites. This suggests the document is part of a link farm or SEO manipulation scheme, potentially designed to redirect users to malicious content or exploit vulnerabilities. The ML classifier strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9981

Heuristics 6

PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF 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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small 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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The 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.
Embedded URL info EMBEDDED_URL

One 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://coretry.ru/uplcv?utm_term=how+to+print+labels+in+epic PDF link annotation
- https://tolgyesvolgy.hu/userfiles/file/dukubuvifemorukapubaxolo.pdfIn PDF document text
- https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e904d490466---63469129763.pdfIn PDF document text
- https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/b859de5313d673c4bd586d7c29151c5b/86254874313.pdfIn PDF document text
- http://huichem.com/ckfinder/userfiles/files/39776500345.pdfIn PDF document text
- https://reaga.net/js/ckfinder/userfiles/files/39973717077.pdfIn PDF document text
- http://magendans.com/imagefiles/file/7695653116.pdfIn PDF document text
- http://www.multigacos.com/admin/uploaded/fck/file/kunom.pdfIn PDF document text
- http://nfc-lampang.com/user_img/files/rozivuvivijisim.pdfIn PDF document text
- http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/da9390915392abe06057fed1ec9deecf/sadekamifamakogopupu.pdfIn PDF document text
- https://nedimgame.com/calisma2/files/uploads/13259845459.pdfIn PDF document text
- http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/qc2llksm978r9q7hion19pd3it/pupanipede.pdfIn PDF document text
- http://aksaaydinlatma.com/img/editor/image/file/77021510966.pdfIn PDF document text
- http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c94dc205f88---21819504201.pdfIn PDF document text
- http://cpghollywood.com/userfiles/files/63126614257.pdfIn PDF document text
- http://aristosaigonhotel.com/uploads/files/68422872745.pdfIn PDF document text
- http://thementalhealthadvocates.org/files/userfiles/file/5360604734.pdfIn PDF document text
- https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d6eb950fd---7662451520.pdfIn PDF document text
- https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/15ea639e7f7f1551c9d6afc96c6f2bb4/44999526340.pdfIn PDF document text
- https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/41k94d2ej889r10f6bpmo97ns5/sikusinagemela.pdfIn PDF document text
- https://szallas-karpatalja.net/upload/53069897317.pdfIn PDF document text
- http://prodottoitalia.eu/userfiles/files/90482996763.pdfIn PDF document text
- https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119efe956f74---wedunu.pdfIn PDF document text
- http://liily.jp/upload/file/20210817111209.pdfIn PDF document text
- http://www.sxc.hu/photo/226833In 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_off0000ed9d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED9D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000105af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105AF	17052 bytes
SHA-256: `3e0beaacbd8586ac60e62139ebea1d6c1381db316adc70e46836547aac2ccc0c`
`font_02_sfnt_off0001325f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1325F	10584 bytes
SHA-256: `e86605d97d720f0767f4265e2092f5a3b7f753440da37e7b35f70b1728b52fe3`

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