PDF malware analysis — malicious · 02177ef82263fae8

MALICIOUS

PDF

81.8 KB Created: 2021-09-12 14:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: e1b71de7731b6b9e8e134bc12f95d863 SHA-1: 5637313192c2366fc57ed6603f31c18b51561f0a SHA-256: 02177ef82263fae808b221e728176001e5bc13bc88c1162669e63dea9f256d54

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as a malicious PDF by ClamAV, specifically 'Pdf.Phishing.Trojan'. Static analysis reveals it functions as a link farm, with numerous embedded URLs pointing to various domains, many of which are hosted on compromised CMS upload storage or disposable hosting. These links likely serve to redirect users to phishing sites or download further malicious content.

Machine Learning

Nyx PDF Classifier suspicious score 0.4864

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 http://asja.ua/userfiles/file/99730242584.pdf In PDF document text
- https://pasarangroup2.com/contents/files/xitexumevowugolemugawuf.pdfIn PDF document text
- http://glovimex.com/uploads/ckfinder/files/26605185988.pdfIn PDF document text
- http://eventologia.com/userfiles/files/judow.pdfIn PDF document text
- https://photopoligrafic.ru/ckfinder/userfiles/files/fijajekugodoniradekenofin.pdfIn PDF document text
- https://steammining.com/userfiles/file/5674342363.pdfIn PDF document text
- https://alhurwallpaper.com/Files/files/buvulakisuvupixevu.pdfIn PDF document text
- http://egitara.com/upfiles/files/23976302619.pdfIn PDF document text
- http://art-lan.ru/uploads/assets/file/90227201325.pdfIn PDF document text
- http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0ba0b3e93---belizobidosari.pdfIn PDF document text
- https://www.premiumtrade.ro/ckfinder/userfiles/files/19681383556.pdfIn PDF document text
- http://asude.istanbul/ck_images/files/94701957175.pdfIn PDF document text
- https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/1fdf939c7a749fe15a5a88eb8e7ed3c9/wapafaworowaxesejunirar.pdfIn PDF document text
- http://abcbyspu.net/ckfinder/images_store/files/kegetepetabufukurodo.pdfIn PDF document text
- http://studiolegaletrotta.eu/userfiles/files/burizolo.pdfIn PDF document text
- https://tktravelkorea.com/FileData/ckfinder/files/20210909_396F2EDB6A10DE39.pdfIn PDF document text
- http://pwmtqatar.net/userfiles/file/67468553981.pdfIn PDF document text
- http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613aeb95c58da---ziwekevubomuzatiboruxan.pdfIn PDF document text
- http://poorclarescork.ie/images/48646995453.pdfIn PDF document text
- http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xatujaxedegulumifaso.pdfIn PDF document text
- http://duetsepolno.pl/userfiles/file/35045501774.pdfIn PDF document text
- http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/hddu1idode85i73she17se7op6/nezuna.pdfIn PDF document text
- http://luxlustry.ru/img/upload/3360506012.pdfIn PDF document text
- http://4x4autok.hu/userfiles/files/jozenumesamefomegekopigig.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=the+miseducation+of+the+negro+free+pdfPDF link annotation
- 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_off0000e9f5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9F5	17784 bytes
SHA-256: `39351c5f6ec62f47948bf8840d65db4fdf497a2c15f58751aed06ea8eda4b975`
`font_01_sfnt_off000117b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x117B0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012fc7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12FC7	11084 bytes
SHA-256: `c37668d7dce07292eb41afaeae709fd1ac459f301ff11a70b996fdaa12eba000`

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