Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ff0d9f2cbf4d07…

MALICIOUS

PDF

72.1 KB Created: 2021-07-20 18:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 203616e8debe9f20c374258a617f86f9 SHA-1: bf9199bf83a9a10b9d661eb34ceebfc76457ac1e SHA-256: 17ff0d9f2cbf4d071011123ea25c678c854b72c812e9e599c0a89557a6a31659
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a malicious intent to lure users to potentially harmful content. The ML classifier also flagged this PDF with a high probability of being malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7429

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://bienbao.org/uploads/files/badafoberopoka.pdf
    • http://loveforlungs.com/clients/a/a9/a9a80f3a93b7553e0860ec1960497db0/File/66696649010.pdf
    • https://synersys.fr/contenu/file/gaxakixabexoxetu.pdf
    • http://bacsionline.net/userfiles/file/lenavijidowotofanarefuf.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1038f2150---77053810352.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/v8j43cctcvl6eqshsgf8su35q1/13799192127.pdf
    • https://hostessima.pl/userfiles/file/xaluvimopepu.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/sfi7smv9fhg4itujqjk2f08040/lufafekizigimig.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/8cf8a27e9ad2735dd505879dcd6a5c1b/71742866406.pdf
    • http://chnli.tw/CKEdit/upload/files/doxejumufeputafe.pdf
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/u66092atp99gr46fshqe42inst/xemomokapuvem.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/1deaadf0cbf4dfc36742d9726f739c26/jugonudiwelagikoju.pdf
    • http://diysmart.net/userfiles/file/90362931868.pdf
    • http://www.derbysignandgraphics.com/uploads/file/lutakikupumekesi.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/abu59tlruuk56lbn0ttp523hd1/5058169903.pdf
    • https://tectrongim.com/uploads/files/penoto.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5fe75ffde---96922534952.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ff3fb492f---wokaku.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//51810685343.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160adccfcae9aa---vinapetuvemepetexa.pdf
    • https://abhimaninteriors.com/ckfinder/userfiles/files/tidatetolojusipuwefebib.pdf
    • http://ottotech.center/userfiles/file/xeruwageposugekene.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=types+of+compulsions
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e54f.bin
265b97290a95b3097abb2e7468a1578ec27241f5ce17bfde7f8d9ecb483096cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE54F 16244 bytes

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