Malicious PDF — malware analysis report

Static analysis result for SHA-256 124b95340c88fd60…

MALICIOUS

PDF

72.1 KB Created: 2021-09-16 02:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 3f2cabec5a67062af491ba59adbc215f SHA-1: e9daf5a0387047b82f1332d8445ac85afc30ea56 SHA-256: 124b95340c88fd60b361b68d8a05da6976641b1a30d730a6a834041aa5c9a24e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the final destination. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, but the structure suggests a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6366

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://allytemp.ru/uplcv?utm_term=how+to+open+webcam+in+android+phone PDF link annotation
    • http://gaziogluenerji.com/images_upload/files/welerinawixewuzirelukig.pdfIn PDF document text
    • http://holdemigny.fr/ckfinder/userfiles/files/89069237158.pdfIn PDF document text
    • http://xn--h1aeekk.xn--p1ai/files/file/5776658459.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/tilexupudilavizovekiz.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/u8pk8ln4c0sitc2at1vjmp5i8m/21209689736.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/35448475427.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/14718643475.pdfIn PDF document text
    • https://kolkataangikar.org/ckfinder/userfiles/files/pizim.pdfIn PDF document text
    • https://85097781.com/upload/files/68056075910.pdfIn PDF document text
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/92820507119.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/20518005004.pdfIn PDF document text
    • http://krajinar.cz/soubory/files/42138449162.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/fifazetuk.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1968d1ee8---fibozarawewoluxixijum.pdfIn PDF document text
    • http://yokosohk.com/files/fckfiles/file/10788151696.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613693bd53cc9---63488878950.pdfIn PDF document text
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/35717985398.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/32877106674.pdfIn PDF document text
    • http://garant-fond.ru/ckeditor/ckfinder/userfiles/Images/files/62349938864.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/50626136199.pdfIn PDF document text
    • http://peknanevesta.sk/media/file/16557618978.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/86449202130.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/gazeruredonivunolijojupev.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE484 17620 bytes
SHA-256: 3f509f5b2c9b01d1ef9257a089a4bf3b088137dc94e139b5011454893dd3e657

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