PDF malware analysis — malicious · 89c104afdb98d443

MALICIOUS

PDF

80.0 KB Created: 2021-07-05 00:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: f8cf5e7f566f3c391ff7841578d5df42 SHA-1: a16196fb9e6f025b4229e348620a34e18d963b53 SHA-256: 89c104afdb98d443b13a61e63a1662d1c3328a4e39bc94347809ad3eb5a4fa24

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as a phishing trojan by ClamAV. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier suspicious score 0.4210

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
External URI info PDF_URI

PDF contains an external URL action
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://smidgel.ru/uplcv?utm_term=create+pdf+online+from+word PDF link annotation
- https://szaktel.hu/uploads/file/39308893722.pdfIn PDF document text
- http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/b86c2a060bc2d6f7ed3b61f9e7dfaf21/5006746184.pdfIn PDF document text
- https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/05e6ba97b646d552815858285ed889f6/32081732189.pdfIn PDF document text
- http://blesk-stroy.ru/userfiles/files/gawogad.pdfIn PDF document text
- https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16084d4bf0d8d0---16536573799.pdfIn PDF document text
- https://hkparkkonutlari.com/image/files/44615398268.pdfIn PDF document text
- https://alarrabnews.com/images/content/content/file/xigoxajidubolofokexafi.pdfIn PDF document text
- http://rencontres-icare.org/userfiles/file/37912684657.pdfIn PDF document text
- http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/e1ae42902d07c17b36404a0e5bb5c010/xeratelanuzakiraro.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/63ce3e0df4d4b058d722b440b999c24c/40158194922.pdfIn PDF document text
- https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/tgqmqfs1rq3r8rsm8vbb6g8a8s/lasigogazitezipabojiliki.pdfIn PDF document text
- https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/782c321716abfceafb5330d527a0c54c/34233024496.pdfIn PDF document text
- http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608349f4122e4---70827240698.pdfIn PDF document text
- http://beveragesgs.com/userfiles/file/71447770740.pdfIn PDF document text
- https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/481e0c54be8f711dc48d50d8341510ae/wobojijenakepuxawo.pdfIn PDF document text
- http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/gujutas.pdfIn PDF document text
- http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609db193410da---wekunigubivekamesowuk.pdfIn PDF document text
- https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607394ff712d8---92381946805.pdfIn PDF document text
- http://chizclean.ru/files/fck/file/48059605780.pdfIn PDF document text
- http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/jdlo4bdvdb3mahap1k6dom6nh7/kavavadakuba.pdfIn PDF document text
- https://led7.ru/file/55064866000.pdfIn PDF document text
- https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083112bf3b78---85874053098.pdfIn PDF document text
- http://atek-ent.com/upload/file/97097644763.pdfIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f864.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF864	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011076.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11076	18040 bytes
SHA-256: `10c865c7f3f114032d7b734eee5c8ce5e0cb117de500b4ada0f3a86f95a4c7c0`

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