Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab72bcf94743dd79…

MALICIOUS

PDF

70.3 KB Created: 2021-10-05 08:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: f1e5a6a54a84be45193655b141bf1d4a SHA-1: 531d45c9a7c52eea83e13c163a1f592b49235aee SHA-256: ab72bcf94743dd7988cd0deb73a85a0c695fc718be4c1ad7c4574dbb31706ba7
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute malware or phish for information. The embedded JavaScript likely facilitates the execution of malicious actions or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9156

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://someteme.com/archivos/_20211003054536.pdf In PDF document text
    • https://almavilag.hu/files/files/rufufezazu.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/2a2d1bb893607bd9fd9fc04bfb2e9c02/14718424179.pdfIn PDF document text
    • https://lmbri.com/WYSIWYGImage/file/xotituxarudavidamen.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/906615137.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/gefokore.pdfIn PDF document text
    • https://unifor975.ca/userfiles/file/24083673944.pdfIn PDF document text
    • http://zgic.ru/!upload/files/potaxemamotesel.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc46f2004d---30930892864.pdfIn PDF document text
    • http://www.hermosabeachbungalows.com/userfiles/files/kozikutegumi.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.net/filespath/files/20210916015443.pdfIn PDF document text
    • http://successalpha.team/upload/files/lagaroviriwudaruvitenel.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/75964436199.pdfIn PDF document text
    • https://senfina.top/uploads/files/fegidezuluwatepetijadum.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/68635528777.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16143d993ab91a---jesifewiju.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/ponoxonexi.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/lutoge.pdfIn PDF document text
    • http://findacommodity.com/upload/file/fasuxafotul.pdfIn PDF document text
    • http://kxxbs.com/uploadfiles/file/a/zumulikokabavexutavamun.pdfIn PDF document text
    • http://irths.com/upload_files/files/tujobesejozavagikib.pdfIn PDF document text
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/mivekudal.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f655nv36t3o44ltfbptq5c9fc0/46942651939.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/60298671071.pdfIn PDF document text
    • http://year-c.com/upload_fck/file/2021-9-20/20210920224840918086.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=gta+v+download+in+android+phonePDF 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_off0000dbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEB 17856 bytes
SHA-256: 901cb4d1b35783746ba2769491a5ea928b4319b4be899062ae8659b0d837ea76

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