PDF malware analysis — malicious · c4fadeef20ca630d

MALICIOUS

PDF

79.0 KB Created: 2021-07-02 19:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02

MD5: 1ea546f7dd7c046e5240064030928bc1 SHA-1: df09543da5f1ff5565c5ec9f3bd3b81710091bc9 SHA-256: c4fadeef20ca630d3d45ce0bf71f36a87b52a2c6992d9a8aba8451136eadbdde

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised CMS upload directories, indicating a link farm designed to host malicious content. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially harmful sites, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.5544

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://kimtuong.vn/isc/public/files/fckupload/file/dilaz.pdf In PDF document text
- https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/4293796af7106033a571102c2b5140ff/52878499508.pdfIn PDF document text
- https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1609dec13de2fb---64055632362.pdfIn PDF document text
- https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ec69090b7---lasegusuvemubuwi.pdfIn PDF document text
- https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/n69faflk664fknlm23stbqdb0d/74572995378.pdfIn PDF document text
- https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/35fc080000f3c12f74314c2dcaf899d9/nefifezaxuvadures.pdfIn PDF document text
- http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ba1c3627b---11738109819.pdfIn PDF document text
- https://aradovan.com/userfiles/file/juvovos.pdfIn PDF document text
- https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/uf67n139pied3ts8t258mb5qvh/76829081572.pdfIn PDF document text
- https://abugfreemind.com/userfiles/file/kixetane.pdfIn PDF document text
- http://miele-service-center.ru/uploads/files/tozawokomafajupijido.pdfIn PDF document text
- http://decaiyun.com/upload/file/210621180049260994gukn8lpwa98f.pdfIn PDF document text
- https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160756400f200e---36433236771.pdfIn PDF document text
- https://fanaf.com/article_ressources/file/ruxuzaxefatil.pdfIn PDF document text
- http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160849cc7495c8---bifutilamiwuxapifelij.pdfIn PDF document text
- https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0f6815249---muzaloxevazawa.pdfIn PDF document text
- http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/63111640028.pdfIn PDF document text
- https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bdbdac5822---5123478383.pdfIn PDF document text
- https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/96dbd2201cfedf26eddd59e5ecbda5a5/pixozixirarevejimatirem.pdfIn PDF document text
- http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/9ec1ec56ca90b40e4b1ea051ec0589a8/dofomasudinikurori.pdfIn PDF document text
- https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091733d6d721---rudowebijuvarewomatex.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=cool+task+force+namesPDF link annotation
- 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_off0000ef11.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF11	10528 bytes
SHA-256: `3979d40025ee31ae5be87e2b05a0a14e0e46ca4af839c0820dbc937e2ae13163`
`font_01_sfnt_off0001071d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1071D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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