Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d460bf11a49410b…

MALICIOUS

PDF

71.9 KB Created: 2021-09-17 08:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ba985ce3f67b70f3a2445ab99e21468a SHA-1: d426113221a53122b8cc6efb97d109aa83431134 SHA-256: 6d460bf11a49410b0d4b92d55ab9e27d9e7ecf85dc4545465f06a5782b51a41f
132 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. The heuristic firings indicate this JavaScript likely redirects to external URLs, as evidenced by the numerous 'unknown' reputation URLs extracted. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6501

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
  • 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://eqonetech.com/upload/userfiles/files/bobosilenekexoxitavexenak.pdf In PDF document text
    • http://nagakuratrading.com/js/upload/files/gefavoleme.pdfIn PDF document text
    • http://www.lircai.com/web/inline/file/kawadinisef.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/161420f3ced831---65349660344.pdfIn PDF document text
    • http://www.gdchgs.com/admin/img/files/pusiwi.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f879699e9b---zimifazodopukovaxo.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/5353708049.pdfIn PDF document text
    • http://divyabodhanam.org/userfiles/file/43071917371.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021091485452_1008089784.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/pulolasuf.pdfIn PDF document text
    • http://newmob.it/userfiles/files/mejozinowapudaja.pdfIn PDF document text
    • http://quocteanviet.com/img-chamthi/files/4900904689.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/76333516826.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/sotede.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xakodij.pdfIn PDF document text
    • http://balletpanov.com/uploads/files/39776442542.pdfIn PDF document text
    • https://snapstudios.ca/userfiles/file/nizukonebujinurikuniji.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/wapedajowaj.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/loledakupagixarivafiwuv.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/93322772732.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=cracking+toefl+ibt+2019+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC274 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8B 11352 bytes
SHA-256: 0f1b539eb4a2f77bb05ddcdae9dfce47549693d0489c92af2164db3e53a4bec7
font_02_sfnt_off0000f50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50A 18096 bytes
SHA-256: b099a197bb8e577ea00e6e5fd1bd9bfecb4956b8f2a5e6898391d7d9380fe682

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