Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8cf0b37305bfc75…

MALICIOUS

PDF

67.9 KB Created: 2021-09-01 22:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ea08b58c4ddf3e3ea0e4873ceb3c6dc3 SHA-1: c7585d1e5934ea04e980b89bb107381af161a0ea SHA-256: d8cf0b37305bfc755efc6fd7c31bfcd7fe38d854b564fde074deff4ab316fc8b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other potentially malicious sites. The primary purpose appears to be directing users to external resources, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9073

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://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/ce19398669a7c61ce783d9ea0dd80824/46932945130.pdf In PDF document text
    • https://media-get.ru/userfiles/files/57360280161.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160705ddc52382---20363595752.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894e4b2a924---68144202637.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/9ce5e6271b888fe136d453f0c8415e0a/jilirovo.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/1569022627.pdfIn PDF document text
    • https://www.douggoodkin.com/admin/ckfinder/userfiles/files/80067687837.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c88adbe9a---17189172547.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f52cac3b8b---43810025605.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/52145229305.pdfIn PDF document text
    • https://foodsafebox.com/ckfinder/userfiles/files/xekinuzino.pdfIn PDF document text
    • http://udelimpa.es/ckfinder/userfiles/files/70737010792.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbc7bac291---60918771940.pdfIn PDF document text
    • http://barexkft.hu/userfiles/file/vimebidupulesumofipuju.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/nonewevegijijejerukasi.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/24294482999.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/19262826975.pdfIn PDF document text
    • https://jucariicopilasi.ro/app/webroot/files/userfiles/files/28398855937.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/85446638033.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160de02d2b2757---telozukosafelexudameb.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/e7uk2u83fgf3ufeg74ibbu4ca9/dufojipiguxajajaga.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/42215620817.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/fajk3jfqtkt4k01a0rd0nl8s0k/norabugara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=healthcare+careers+that+pay+wellPDF link annotation
    • 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_off0000dc9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9B 17592 bytes
SHA-256: 4682b50e6eac513f106a3e879dcb8e4a9123a9a78bec46df762d68459098a143

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