Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f1c44b407c9821…

MALICIOUS

PDF

65.1 KB Created: 2021-09-12 19:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e1d14b8deacd39a7310e1d32d92912ff SHA-1: 166ab0a718e4f3504047b860b8db3c9f82206310 SHA-256: d3f1c44b407c9821d22e88a171e8c99e149ab9f47cc16db6458f2aa6e6d50d16
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, several of which appear to be compromised WordPress sites, suggesting an attempt to obscure the final destination. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7110

Heuristics 6

  • 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.
  • 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 https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c71873a373---menobinabawabizanufubuz.pdf In PDF document text
    • http://daisin1977.com/js/upload/files/tixogudutut.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/musifo.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/wanoxasedibevuju.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/dde143bdcf128c1af58c72bfcecc0ad3/56106478962.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/wuvonu.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/xufuduluvowuribil.pdfIn PDF document text
    • http://dreiseengrundschule.de/files/sedureg.pdfIn PDF document text
    • https://drproperty.in/userfiles/file/jesomazevofokironirumona.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/fipuxafuwiv.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/zamalaxadase.pdfIn PDF document text
    • http://dkind.net/userData/board/file/39680511730.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/97651610503.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/muromitifibebu.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/laximujav.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161363d02e1776---ruxowarolebe.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/6400549001.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/65160838205.pdfIn PDF document text
    • http://wajl.net/img/file/20219643251.pdfIn PDF document text
    • http://msdoubrava.cz/foto/images/file/lajorugotavojawad.pdfIn PDF document text
    • http://ros-audit.com/i/up/file/46117213539.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddaeb817b5---29703445891.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/pakirezikived.pdfIn PDF document text
    • http://mq-water.net/upload/kilotefemuxaxivujev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=singham+punjabi+full+movie+hd+1080p+free+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC40D 11660 bytes
SHA-256: d98d247a7a295cb11c1aa66b827f10dc51b0719362a5ea4c5d4195dd0998b3ad
font_01_sfnt_off0000df2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2D 17536 bytes
SHA-256: f26ce66de14d93f275485e32f53ed20ecda130e5a5e73aaf0eb1fe0e4b0b8ae9

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